class SampleController
{
    public function sample(Application $app)
    {
        return 'Hello, Plugin World!!';
    }
}

class CategoryContentServiceProvider implements ServiceProviderInterface
{
    public function register(BaseApplication $app)
    {
        // 管理画面の受注管理にメニューを追加
        $app['config'] = $app->share($app->extend('config', function ($config) {
            $config['nav'][1]['child'][] = array(
                'id' => 'order_sample',
                'name' => 'サンプル',
                'url' => 'sample',
            );

            return $config;
        }));
    }
}