你可以试试这个代码。第一个过滤器用于自定义小部件参数，第二个过滤器用于菜单生成。

add_filter("widget_nav_menu_args", function ($nav_menu_args, $nav_menu, $args, $widget_instance) {

    $post = get_queried_object();

    if (is_a($post, "WP_Post")) {
        $nav_menu_args["remove_post_in_widget"] = $post->ID;
    }


    return $nav_menu_args;

}, 10, 4);


add_filter("wp_nav_menu_objects", function ($sorted_menu_items, $args) {

    if (isset($args->remove_post_in_widget)) {

        foreach ($sorted_menu_items as $index => $item) {

            if ((int) $item->object_id === $args->remove_post_in_widget) {
                unset($sorted_menu_items[$index]);
                break; // stop the loop when the first post is found
            }

        }

    }


    return $sorted_menu_items;

}, 10, 2);