bp_forums_highlight_topic_tag_submenu( $submenu_file )

function bp_forums_highlight_topic_tag_submenu( $submenu_file ) {
	$taxonomy = isset( $_GET['taxonomy'] )? $_GET['taxonomy'] : '';
	$post_type = isset( $_GET['post_type'] )? $_GET['post_type'] : '';

	if ( bbp_get_topic_tag_tax_id() == $taxonomy && bbp_get_topic_post_type() == $post_type ) {
		return 'edit-tags.php?taxonomy=' . bbp_get_topic_tag_tax_id() . '&post_type=' . bbp_get_topic_post_type();
	}

	return $submenu_file;
}