Outputting Page Title As Tooltip

Found a way… instead of using wp_nav_menu()

$menu_name="main-menu";

if ( ( $locations = get_nav_menu_locations() ) && isset( $locations[ $menu_name ] ) ) {
    $menu = wp_get_nav_menu_object( $locations[ $menu_name ] );

    $menu_items = wp_get_nav_menu_items($menu->term_id);

    $menu_list="<ul id="menu-main-menu">";
    foreach ( (array) $menu_items as $key => $menu_item ) {
        $title = $menu_item->title;
        $url = $menu_item->url;
        $id = $menu_item->ID;
        $menu_list .= '<li id="menu-item-' . $id . '"><a href="' . $url . '"></a><div class="pop_up">' . $title . '</div></li>';
    }

    $menu_list .= '</ul>';

}

echo ($menu_list);