public function adicionarAction()
 {
     require_once APPLICATION_PATH . '/modules/admin/forms/Categoria.php';
     $this->view->form = new admin_Form_Categoria();
     $categoriaModel = new Application_Model_Categoria();
     if ($this->_request->isPost()) {
         $this->view->form->setDefaults($this->_request->getPost());
         $data = $this->view->form->getValues();
         if ($this->view->form->isValid($data)) {
             $id = $categoriaModel->insert($data);
             return $this->_helper->redirector('index');
         }
     }
 }