构建器代码：

<?PHP
// src/Acme/DemoBundle/Menu/Builder.PHP
namespace Acme\DemoBundle\Menu;

use Knp\Menu\FactoryInterface;
use Symfony\Component\DependencyInjection\ContainerAware;

class Builder extends ContainerAware
{
    public function mainMenu(FactoryInterface $factory,array $options)
    {
        $menu = $factory->createItem('root');

        $menu->addChild('Home',array('route' => 'index'));
        $menu->addChild('About Me',array('route' => 'products'));

        return $menu;
    }
}