$Categories = $this->app['eccube.repository.category']
            ->getList(null, true);

        $builder->add('mode', 'hidden', array(
            'data' => 'search',
        ));
        $builder->add('category_id', 'entity', array(
            'class' => 'Eccube\Entity\Category',
            'property' => 'NameWithLevel',
            'choices' => $Categories,
            'empty_value' => '全ての商品',
            'empty_data' => null,
            'required' => false,
            'label' => '商品カテゴリから選ぶ',
        ));