function wp_nav_menu_setup() { // Register meta boxes.
wp_nav_menu_post_type_meta_boxes();
add_meta_box( 'add-custom-links',
__( 'Custom Links'
),
'wp_nav_menu_item_link_meta_box',
'nav-menus',
'side',
'default'
);
wp_nav_menu_taxonomy_meta_boxes();
// Register advanced menu items (columns).
add_filter( 'manage_nav-menus_columns', 'wp_nav_menu_manage_columns'
);
// If first time editing, disable advanced items by default.
if ( false ===
get_user_option( 'managenav-menuscolumnshidden'
) ) { $user =
wp_get_current_user();
update_user_meta( $user->ID,
'managenav-menuscolumnshidden',
array
(