Ajouter la classe “current-menu-item” sur le menu-item d’une archive

/**
 *  PIT - Nav Menu CSS Class
 *  - Add "current-menu-item" on the archive link when we are on a "singular"
 */
add_filter('nav_menu_css_class' , '_pit_menu_item_css_class_singular' , 10, 4);
function _pit_menu_item_css_class_singular($classes, $item, $args, $depth) {

    $menu_item_type = $item->type;
    if ($menu_item_type !== 'post_type_archive')
        return $classes;

    $post_type = $item->object;
    if (!is_singular($post_type))
        return $classes;

    $classes[] = 'current-menu-item';
    return $classes;
}