function alx_custom_post_archive( $query ) {
		if ($query->is_archive)
			$query->set( 'post_type', array( 'code', 'themes', 'nav_menu_item', 'post') );
		remove_action( 'pre_get_posts', 'alx_custom_post_archive' );
	}
	add_action( 'pre_get_posts', 'alx_custom_post_archive' );