public function editarAction()
 {
     $id = $this->_request->getParam('id');
     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)) {
             $categoriaModel->update($data, 'id_categoria = ' . $id);
             return $this->_helper->redirector('index');
         }
     }
     $categoria = $categoriaModel->find($id)->current();
     $this->view->form->setDefaults($categoria->toArray());
 }