I have this filter: 

    function wpa_filter_nav_menu_objects( $items){
        global $count4footer;

        foreach( $items as $item ){

            $count = countPosts($item->ID);
            if($count!==false){
                $item->title = $item->title." ($count)";
                $count4footer[$item->ID]=$count;
            }
        }

        return $items;
    }
    add_filter( 'wp_nav_menu_objects', 'wpa_filter_nav_menu_objects' );

I need to pass variable to the footer, but is printing `null`, I added `global $count4footer;` to the function , but to no effect.  
How can I access this value later?