protected function deleteCategory()
    {
        $this->controlAccess('category_delete');

        if ($this->category->delete($this->data_category['category_id'])) {
            $url = "admin/content/category/{$this->data_category_group['category_group_id']}";
            $this->redirect($url, $this->text('Category has been deleted'), 'success');
        }

        $this->redirect('', $this->text('Category has not been deleted'), 'warning');
    }