仅当具有带有Laravel的产品时，才在菜单上显示子类别

class MenuItem {
    public $name;
    public $url;
    public $subcategories;

    public function __construct($name, $url, $subcategories = []) {
        $this->name = $name;
        $this->url = $url;
        $this->subcategories = $subcategories;
    }
}

// 示例菜单项数据
$menuItems = [
    new MenuItem('Home', '/'),
    new MenuItem('Products', '/products', [
        new MenuItem('Category 1', '/category1'),
        new MenuItem('Category 2', '/category2'),
        new MenuItem('Category 3', '/category3'),
    ]),
    new MenuItem('About', '/about'),
    // ...
];

// 路由定义
Route::get('/', 'HomeController@index');

// HomeController.php
class HomeController extends Controller {
    public function index() {
        // 获取具有带有Laravel的产品的条件
        $hasLaravelProduct = true;

        // 根据条件获取菜单项的数据
        $menuItems = $this->getMenuItems($hasLaravelProduct);

        return view('home', ['menuItems' => $menuItems]);
    }

    private function getMenuItems($hasLaravelProduct) {
        // 根据条件返回相应的菜单项数据
        if ($hasLaravelProduct) {
            // 返回包含子类别的菜单项数据
            return [
                new MenuItem('Home', '/'),
                new MenuItem('Products', '/products', [
                    new MenuItem('Category 1', '/category1'),
                    new MenuItem('Category 2', '/category2'),
                    new MenuItem('Category 3', '/category3'),
                ]),
                new MenuItem('About', '/about'),
                // ...
            ];
        } else {
            // 返回不包含子类别的菜单项数据
            return [
                new MenuItem('Home', '/'),
                new MenuItem('About', '/about'),
                // ...
            ];
        }
    }
}

<!-- home.blade.php -->
<ul>
    @foreach ($menuItems as $menuItem)
        <li>
            <a href="{{ $menuItem->url }}">{{ $menuItem->name }}</a>
            @if (!empty($menuItem->subcategories))
                <ul>
                    @foreach ($menuItem->subcategories as $subcategory)
                        <li><a href="{{ $subcategory->url }}">{{ $subcategory->name }}</a></li>
                    @endforeach
                </ul>
            @endif
        </li>
    @endforeach
</ul>