wp_initial_nav_menu_meta_boxes()

226function wp_initial_nav_menu_meta_boxes() {227	global $wp_meta_boxes;228 229	if ( get_user_option( 'metaboxhidden_nav-menus' ) !== false || ! is_array( $wp_meta_boxes ) ) {230		return;231	}232 233	$initial_meta_boxes = array( 'add-post-type-page', 'add-post-type-post', 'add-custom-links', 'add-category' );234	$hidden_meta_boxes  = array();235 236	foreach ( array_keys( $wp_meta_boxes['nav-menus'] ) as $context ) {237		foreach ( array_keys( $wp_meta_boxes['nav-menus'][ $context ] ) as $priority ) {238			foreach ( $wp_meta_boxes['nav-menus'][ $context ][ $priority ] as $box ) {239				if ( in_array( $box['id'], $initial_meta_boxes, true ) ) {240					unset( $box['id'] );241				} else {242					$hidden_meta_boxes[] = $box['id'];243				}244			}245		}246	}247 248	$user = wp_get_current_user();249	update_user_meta( $user->ID, 'metaboxhidden_nav-menus', $hidden_meta_boxes );250}