Drop-in helper to extend cake form helper to work with bootstrap

BootstrapFormHelper.php

<?php
App::uses('FormHelper', 'View/Helper');

class BootstrapFormHelper extends FormHelper {
/**
 * Overide parent method to use bootstrap input classes
 *
 * @param string $fieldName name of field to pass to parent method
 * @param array $options list of options to pass to parent method
 * 
 * @return string
 */
    public function input($fieldName, $options = array()) {
        $defaults = array(
            'class' =>  'form-control',
            'div'   =>  array(
				'class' => 'form-group'
            ),
        );

        $options = Set::merge($defaults, $options);
        return parent::input($fieldName, $options);
    }
}