Vitrine/app/View/Helper/AppHelper.php

<?php
/**
 * Application level View Helper
 *
 * This file is application-wide helper file. You can put all
 * application-wide helper-related methods here.
 *
 * @link          http://cakephp.org CakePHP(tm) Project
 * @package       app.View.Helper
 * @since         CakePHP(tm) v 0.2.9
 */

App::uses('Helper', 'View');

/**
 * Application helper
 *
 * Add your application-wide methods in the class below, your helpers
 * will inherit them.
 *
 * @package       app.View.Helper
 */
class AppHelper extends Helper {
}