Number to month name

echo form_label('Month: ');
$options = array(
 '0' => 'New',
 '1' => 'January',
 '2' => 'February',
 '3' => 'March',
 '4' => 'April',
 '5' => 'May',
 '6' => 'June',
 '7' => 'July',
 '8' => 'August',
 '9' => 'September',
'10' => 'October',
'11' => 'November',
'12' => 'December',
'13' => 'I'm an idiot!',
);