Insert icon in search autocomplete: Global BuddyPress search

/**
 * Insert icon in search autocomplete
 */
function cpt_add_icon( $html, $type, $url, $type_label ) {
 $category_search_url = esc_url( add_query_arg( array( 'subset' => $type ), $url ) );
 $icon = '<i class="fa fa-gg-circle" aria-hidden="true"></i>';

 if ( $type == 'forum' ) {
 $html = "<span>" . $icon . "<a href='" . esc_url( $category_search_url ) . "'>" . $type_label . "</a></span>";
 }

 return $html;
}


add_filter( 'buddypress_gs_autocomplete_category', 'cpt_add_icon', 10, 4 );