public static function getHelpsByUser($userId)
 {
     $CI =& get_instance();
     $CI->load->model('request_model');
     $results = $CI->request_model->getHelpsByUser($userId);
     $return = array();
     if (!empty($results)) {
         foreach ($results as $result) {
             $return[] = CI_Request::getInstance($result);
         }
     }
     return $return;
 }