echo yii\widgets\Menu::Widget([
    'items' => $tree,
    'activeCssClass' => $activeClass,
    'activateParents' => $activateParents,
    'options' => [
        'class' => 'categories-content',
     ],

    'itemOptions'	=> [
    'class'	=> 'has-child arrow-sub cat-item cat-parent',
    ],
    'submenuTemplate'	=> '<ul class="children">{items}</ul>',
    'linkTemplate'	=> '<a href="{url}">{label}</a><span class="arrow-cate"></span>',





]);