my navmenu disapper when wp updeted v4.0

Hi …..
I have big problem my nav-menu disapper when wp updeted to v4.0 and i can’t solve this problem it shows one item in menu (contact) the code i use is :

<div id="pageMenu">
                    <?php wp_nav_menu(array('menu' => 'main-navigation', 'menu_class' => 'mainNavWrapper', 'depth' => '1')); ?>
                    <?php
                    // Getting current page's menu ID;
                    global $wpdb, $post;

                    $menu_item_id = $wpdb->get_var('SELECT post_id FROM ' . $wpdb->postmeta . ' WHERE meta_key="_menu_item_object_id" AND meta_value="' . $post->ID . '" ORDER BY meta_id DESC LIMIT 0,1');

                    $menu_name = 'main-navigation';

                    // Creating empty array to save to children in.
                    $menu_children = array();

                    // Loop through all nav menu items
                    $currentNavigationItem = null;

                    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);

                        foreach ((array) $menu_items as $key => $menu_item) {
                            if ($menu_item->ID == $menu_item_id)
                                $currentNavigationItem = $menu_item;
                        }
                    }

                    $parent = $menu_item_id;

                    if (isset($currentNavigationItem->menu_item_parent) && $currentNavigationItem->menu_item_parent > 0) {
                        $parent = $currentNavigationItem->menu_item_parent;
                    }

                    foreach ((array) $menu_items as $key => $menu_item) {
                        // Check if the current menu_item_id is the same as the parent item id.
                        if ($menu_item->menu_item_parent == $parent) {
                            // Save menu item in the empty array.
                            $menu_children[] = $menu_item;
                        }
                    }

                    // Print the submenu.
                    ?>
                    <ul class="mainNavSub">
                        <?php
                        foreach ($menu_children as $child) {
                            if ($post->ID == $child->object_id) {
                                echo "<li class='current-sub-menu-item'>";
                            } else {
                                echo "<li class='" . $post->ID . "::" . $child->object_id . "'>";
                            }
                            echo "<a href='" . $child->url . "'>" . $child->title . "</a>";
                            echo "</li> \n";
                        }
                        ?>
                    </ul>
                </div>
            </div>

can any one help me ?