Filter Widget Title to add span on first word

gistfile1.txt

add_filter ( 'widget_title', 'kellyboudreau_add_span_widgets' );
function kellyboudreau_add_span_widgets( $old_title ) {
	$title = explode( " ", $old_title, 2 );
	if ( isset( $title[0] ) && isset( $title[1] ) ) {
		$titleNew = "<span>$title[0]</span> $title[1]";
	}
	else {
		return;
	}
	return $titleNew;
}