Filter to change order of media tabs in rtMedia sidebar widget gallery

functions.php

<?php

/**
 * Change the media order tab in rtMedia sidebar widgets gallery.
 *
 * @since 1.3.5
 *
 * @param array $allowed     Contain the media tab list that will be going to be display in the rtMedia sidebar widget gallery.
 * @param array $widgetid    Contain widget id.
 *
 * @return array Media tab list in custom order.W
 */
function tmp_rtm_rtmedia_gallery_widget_ordering_callback( $allowed, $widgetid = '' ) {
	return array( 'all', 'music', 'video' , 'photo' );
}
add_filter( 'rtmedia_gallery_widget_ordering', 'tmp_rtm_rtmedia_gallery_widget_ordering_callback', 10, 2 );