[TigerC10]

PHP Code:

$options = explode("\n", $vbulletin->options['option_list']);

$output = '<select name="option_list">';
foreach( $options as $option ){
    $output .='<option value="'.$option.'">'.$option.'</option>';
}
$output .='</select>';

echo $output; 


The variable name "options_list" is a bad name, you should make it more unique like "mymod_options_list" where mymod is the name of your modification to the vBulletin code.