I have a five dimensional array ,

I would like to filter items in a different levels ,

every item that it's url equals to "MUSET REMOVED" should be removed .

    $menu = array(
        "System" => array(
            "VisibleName" => "System",
            "Children" => array(
                "Access" => array(
                    "VisibleName" => "Access",
                    "Url"=>"/sth",
                    "Children" => array(
                        "Groups" => array(
                            "VisibleName" => "Groups",
                            "Url" => "/Groups"
                        ),
                        "LockoutTable" => array(
                            "VisibleName" => "LockoutTable",
                            "Url" => "MUST REMOVED"
                        ),
                        "Password" => array(
                            "VisibleName" => "Password",
                            "Url" => "MUST REMOVED"
                        ),
                    
                    ),
                "users" => array(
                    "VisibleName" => "users",
                    "Url"=>"MUST REMOVED",
                    "Children" => array()
                ),
                "roles" => array(
                    "VisibleName" => "Access",
                    "Url"=>"/roles",
                    "Children" => array()
                    )
                ),
            )
        ),
    );

    $filtered_menu = array();

    foreach ($menu as $level_one_k => $level_one_v) {

        $level_two_filtered=array();

        foreach($level_one_v as $level_two_k=>$level_two_v){
           // i dont know How to continue this
           // it must filter every item that its Url == "MUST REMOVED"
        }

        $filtered_menu[$level_one_k]=$level_two_filtered;
    }

I don't know How to handle filter of such complicated array .

the expected result would be like this:

    $menu = array(
        "System" => array(
            "VisibleName" => "System",
            "Children" => array(
                "Access" => array(
                    "VisibleName" => "Access",
                    "Url"=>"/sth",
                    "Children" => array(
                        "Groups" => array(
                            "VisibleName" => "Groups",
                            "Url" => "/Groups"
                        ),
                    
                    ),

                "roles" => array(
                    "VisibleName" => "Access",
                    "Url"=>"/roles",
                    "Children" => array()
                    )
                ),
            )
        ),
    );