public function admin_edit($tagId = null) {
  try {
   $result = $this->Tag->edit($tagId, $this->data);
   if ($result === true) {
    $this->Session->setFlash(__d('tags', 'Tag saved.', true));
    $this->redirect(array('action' => 'index'));
   } else {
    $this->data = $result;
   }
  } catch (Exception $e) {
   $this->Session->setFlash($e->getMessage());
   $this->redirect(array('action' => 'index'));
  }

  if (empty($this->data)) {
   $this->data = $this->Tag->data;
  }
 }