To create a drop down that displays text but records a number,
consider the following field array:

$select_no_yes = array('0' => 'No', '1' => 'Yes');

$opts['fdd']['hidden'] = array(
  'default'    => '0',
  'help|ACP'   => 'Select',
  'input'      => '',
  'maxlen'     => 1,
  'name'       => 'Hidden',
  'options'    => 'ACPVDFL',
  'required'   => false,
  'select'     => 'D',
  'sort'       => true,
  'values2'    => $select_no_yes
);

-----

The following example illustrates post-initialization of the
'values2' array. Readability is sometimes be enhanced by
post-initializing the 'values2' array.

$opts['fdd']['hidden'] = array(
  'default'    => '0',
  'help|ACP'   => 'Select',
  'input'      => '',
  'maxlen'     => 1,
  'name'       => 'Hidden',
  'options'    => 'ACPVDFL',
  'required'   => false,
  'select'     => 'D',
  'sort'       => true
);
$opts['fdd']['hidden']['values2'] = array('0' => 'No',  '1' => 'Yes');

-----

Examples of post-initialized drop downs follow.

$opts['fdd']['col_name']['values2'] = array(
  'N' => 'No',
  'Y' => 'Yes',
);

$opts['fdd']['col_name']['values2'] = array(
   '0' => 'Public',
   '1' => 'Private'
);

$opts['fdd']['col_name']['values2'] = array(
  '0' => 'Uncategorized',
  '1' => 'First Class',
  '2' => 'Second Class',
  '3' => 'Third Class'
);

$opts['fdd']['col_name']['values2'] = array(
   '' => '',
   'AL' => 'Alabama',
   'AK' => 'Alaska',
   'AZ' => 'Arizona',
   'AR' => 'Arkansas',
   'CA' => 'California',
   'CO' => 'Colorado',
   'CT' => 'Connecticut',
   'DC' => 'Dist. of Columbia',
   'DE' => 'Delaware',
   'FL' => 'Florida',
   'GA' => 'Georgia',
   'HI' => 'Hawaii',
   'ID' => 'Idaho',
   'IL' => 'Illinois',
   'IN' => 'Indiana',
   'IA' => 'Iowa',
   'KS' => 'Kansas',
   'KY' => 'Kentucky',
   'LA' => 'Louisiana',
   'ME' => 'Maine',
   'MD' => 'Maryland',
   'MA' => 'Massachusetts',
   'MI' => 'Michigan',
   'MN' => 'Minnesota',
   'MS' => 'Mississippi',
   'MO' => 'Missouri',
   'MT' => 'Montana',
   'NE' => 'Nebraska',
   'NV' => 'Nevada',
   'NH' => 'New Hampshire',
   'NJ' => 'New Jersey',
   'NM' => 'New Mexico',
   'NY' => 'New York',
   'NC' => 'North Carolina',
   'ND' => 'North Dakota',
   'OH' => 'Ohio',
   'OK' => 'Oklahoma',
   'OR' => 'Oregon',
   'PA' => 'Pennsylvania',
   'RI' => 'Rhode Island',
   'SC' => 'South Carolina',
   'SD' => 'South Dakota',
   'TN' => 'Tennessee',
   'TX' => 'Texas',
   'UT' => 'Utah',
   'VT' => 'Vermont',
   'VA' => 'Virginia',
   'WA' => 'Washington',
   'WV' => 'West Virginia',
   'WI' => 'Wisconsin',
   'WY' => 'Wyoming'
);

$opts['fdd']['col_name']['values2']   = array(
   '0' => 'Sunday',
   '1' => 'Monday',
   '2' => 'Tuesday',
   '3' => 'Wednesday',
   '4' => 'Thursday',
   '5' => 'Friday',
   '6' => 'Saturday'
);

If the same array for 'values2' will be used multiple times
in your form, consider creating it in a way that will
enhance readability when it's applied.

$yn = array(
   '0' => 'No',
   '1' => 'Yes'
);

$opts['fdd']['col_name']['values2'] = $yn;

-----

/*
CREATE TABLE IF NOT EXISTS `cc_balance` (
  `id` tinyint(4) NOT NULL auto_increment,
  `creditor` smallint(6) NOT NULL,
  `amount` float(8,2) NOT NULL,
  `mo_` char(2) NOT NULL,
  `da_` char(2) NOT NULL,
  `yr_` char(4) NOT NULL,
  PRIMARY KEY  (`id`),
  KEY `creditor` (`creditor`),
  KEY `yr_` (`yr_`)
) ENGINE=MyISAM  DEFAULT CHARSET=utf8;
*/


$opts['fdd']['id'] = array(
  'css'        => array('postfix' => 'right-justify'),
  'default'    => '',
  'input'      => 'R',
  'maxlen'     => 4,
  'name'       => 'Id',
  'options'    => 'VD',
  'required'   => true,
  'select'     => 'T',
  'size|ACP'   => 4,
  'sort'       => true
);
// MySQL column 0: int - tinyint(4)


// Records the `contact_id` from the `contacts` table as `creditor` in the main table.
// Displays a drop down list containing `company` names found in the `contacts` table.
// Displays only those records categorized as a Creditor in the `contacts` table.
// Sorts the list alphabetically.

$opts['fdd']['creditor'] = array(
  'default'    => '',
  'input'      => '',
  'maxlen'     => 2,
  'name'       => 'Creditor',
  'options'    => 'ACPVDFL',
  'required'   => true,
  'select'     => 'D',
  'size|ACP'   => 2,
  'sqlw'       => 'TRIM("$val_as")',
  'sort'       => true,
  'values'   => array(
    'table' => 'contacts',
    'column' => 'contact_id',
    'description'=> array(
       'columns' => array('0' => 'company'),
     ),
    'filters'     => 'category = "Creditor" AND category <> ""',
    'orderby'     => 'company'
   )
);


$opts['fdd']['amount'] = array(
  'css'        => array('postfix' => 'right-justify'),
  'default'    => '',
  'input'      => '',
  'maxlen'     => 11,
  'number_format' => array(2, '.', ','),
  'name'       => 'Amount',
  'options'    => 'ACPVDFL',
  'required'   => true,
  'select'     => 'T',
  'size|ACP'   => 8,
  'sqlw'       => 'TRIM("$val_as")',
  'sort'       => true
);


$opts['fdd']['mo_'] = array(
  'css'        => array('postfix' => 'right-justify'),
  'default'    => date('m'),
  'input'      => '',
  'maxlen'     => 2,
  'name'       => 'MO',
  'options'    => 'ACPVDFL',
  'required'   => false,
  'select'     => 'D',
  'size|ACP'   => 2,
  'sqlw'       => 'TRIM("$val_as")',
  'sort'       => true,
  'values2'    => array( '01' => 'Jan', '02' => 'Feb', '03' => 'Mar', '04' => 'Apr', '05' => 'May', '06' => 'Jun', '07' => 'Jul', '08' => 'Aug', '09' => 'Sep', '10' => 'Oct', '11' => 'Nov', '12' => 'Dec' )
);


$opts['fdd']['da_'] = array(
  'css'        => array('postfix' => 'right-justify'),
  'default'    => date('d'),
  'input'      => '',
  'maxlen'     => 2,
  'name'       => 'DA',
  'options'    => 'ACPVDFL',
  'required'   => false,
  'select'     => 'T',
  'size|ACP'   => 2,
  'sqlw'       => 'TRIM("$val_as")',
  'sort'       => true,
  'mask'       => '%02d',
  'values' => array('', '01', '02', '03', '04', '05', '06', '07', '08', '09', '10', '11', '12', '13', '14', '15', '16', '17', '18', '19', '20', '21', '22', '23', '24', '25', '26', '27', '28', '29', '30', '31')
);


$opts['fdd']['yr_'] = array(
  'css'        => array('postfix' => 'right-justify'),
  'default'    => date('Y'),
  'input'      => '',
  'maxlen'     => 4,
  'name'       => 'YR',
  'options'    => 'ACPVDFL',
  'required'   => false,
  'select'     => 'D',
  'size|ACP'   => 4,
  'sqlw'       => 'TRIM("$val_as")',
  'sort'       => true,
  'values' => range(date('Y')-1, date('Y') + 5)
);

-----


$hours = array(
   '' => 'TBD',
   '01:00:00' => '1:00 AM',
   '01:15:00' => '1:15 AM',
   '01:30:00' => '1:30 AM',
   '01:45:00' => '1:45 AM',
   '02:00:00' => '2:00 AM',
   '02:15:00' => '2:15 AM',
   '02:30:00' => '2:30 AM',
   '02:45:00' => '2:45 AM',
   '03:00:00' => '3:00 AM',
   '03:15:00' => '3:15 AM',
   '03:30:00' => '3:30 AM',
   '03:45:00' => '3:45 AM',
   '04:00:00' => '4:00 AM',
   '04:15:00' => '4:15 AM',
   '04:30:00' => '4:30 AM',
   '04:45:00' => '4:45 AM',
   '05:00:00' => '5:00 AM',
   '05:15:00' => '5:15 AM',
   '05:30:00' => '5:30 AM',
   '05:45:00' => '5:45 AM',
   '06:00:00' => '6:00 AM',
   '06:15:00' => '6:15 AM',
   '06:30:00' => '6:30 AM',
   '06:45:00' => '6:45 AM',
   '07:00:00' => '7:00 AM',
   '07:15:00' => '7:15 AM',
   '07:30:00' => '7:30 AM',
   '07:45:00' => '7:45 AM',
   '08:00:00' => '8:00 AM',
   '08:15:00' => '8:15 AM',
   '08:30:00' => '8:30 AM',
   '08:45:00' => '8:45 AM',
   '09:00:00' => '9:00 AM',
   '09:15:00' => '9:15 AM',
   '09:30:00' => '9:30 AM',
   '09:45:00' => '9:45 AM',
   '10:00:00' => '10:00 AM',
   '10:15:00' => '10:15 AM',
   '10:30:00' => '10:30 AM',
   '10:45:00' => '10:45 AM',
   '11:00:00' => '11:00 AM',
   '11:15:00' => '11:15 AM',
   '11:30:00' => '11:30 AM',
   '11:45:00' => '11:45 AM',
   '12:00:00' => '12:00 PM',
   '12:15:00' => '12:15 PM',
   '12:30:00' => '12:30 PM',
   '12:45:00' => '12:45 PM',
   '13:00:00' => '1:00 PM',
   '13:15:00' => '1:15 PM',
   '13:30:00' => '1:30 PM',
   '13:45:00' => '1:45 PM',
   '14:00:00' => '2:00 PM',
   '14:15:00' => '2:15 PM',
   '14:30:00' => '2:30 PM',
   '14:45:00' => '2:45 PM',
   '15:00:00' => '3:00 PM',
   '15:15:00' => '3:15 PM',
   '15:30:00' => '3:30 PM',
   '15:45:00' => '3:45 PM',
   '16:00:00' => '4:00 PM',
   '16:15:00' => '4:15 PM',
   '16:30:00' => '4:30 PM',
   '16:45:00' => '4:45 PM',
   '17:00:00' => '5:00 PM',
   '17:15:00' => '5:15 PM',
   '17:30:00' => '5:30 PM',
   '17:45:00' => '5:45 PM',
   '18:00:00' => '6:00 PM',
   '18:15:00' => '6:15 PM',
   '18:30:00' => '6:30 PM',
   '18:45:00' => '6:45 PM',
   '19:00:00' => '7:00 PM',
   '19:15:00' => '7:15 PM',
   '19:30:00' => '7:30 PM',
   '19:45:00' => '7:45 PM',
   '20:00:00' => '8:00 PM',
   '20:15:00' => '8:15 PM',
   '20:30:00' => '8:30 PM',
   '20:45:00' => '8:45 PM',
   '21:00:00' => '9:00 PM',
   '21:15:00' => '9:15 PM',
   '21:30:00' => '9:30 PM',
   '21:45:00' => '9:45 PM',
   '22:00:00' => '10:00 PM',
   '22:15:00' => '10:15 PM',
   '22:30:00' => '10:30 PM',
   '22:45:00' => '10:45 PM',
   '23:00:00' => '11:00 PM',
   '23:15:00' => '11:15 PM',
   '23:30:00' => '11:30 PM',
   '23:45:00' => '11:45 PM',
   '24:00:00' => '12:00 PM',
   '24:15:00' => '12:15 PM',
   '24:30:00' => '12:30 PM',
   '24:45:00' => '12:45 PM'
);