wpseek.com
A WordPress-centric search engine for devs and theme authors

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(
				0 => 'link-target',
				1 => 'css-classes',
				2 => 'xfn',
				3 => 'description',
				4 => 'title-attribute',
			)
		);
	}
}