/**
  * 删除权限
  */
 public function delAction()
 {
     $this->privilege->del($this->_request->getParam('priv_name'));
     $this->_redirect($this->view->url(array('module' => 'admin', 'controller' => 'privilege', 'action' => 'list'), '', true));
     $this->isload = false;
 }