$currentcatobj = get_category(get_query_var('cat'),false);
$currentcat = $currentcatobj->term_id;

$includecats = " AND $wpdb->posts.ID IN (

			SELECT  object_id
			FROM    $wpdb->term_relationships AS r
					JOIN $wpdb->term_taxonomy AS x ON x.term_taxonomy_id = r.term_taxonomy_id
					JOIN $wpdb->terms AS t ON t.term_id = x.term_id
			WHERE   x.taxonomy = 'category'
					AND object_id IN
					   (
						SELECT object_id
						FROM $wpdb->term_relationships AS r
						JOIN $wpdb->term_taxonomy AS x ON x.term_taxonomy_id = r.term_taxonomy_id
						JOIN $wpdb->terms AS t ON t.term_id = x.term_id
						WHERE   x.taxonomy = 'category'
						AND t.term_id IN  (".$currentcat.")))";



$mostpopular = $wpdb->get_results("SELECT $wpdb->posts.ID, $wpdb->posts.post_title $fields FROM $wpdb->posts $join WHERE $wpdb->posts.post_status = 'publish' AND $wpdb->posts.post_password = '' AND $range $force_pv $nopages $exclude $includecats GROUP BY $wpdb->posts.ID ORDER BY $sortby DESC LIMIT " . $instance['limit'] . "");
$cat_name = get_cat_name($currentcat);
$content = "$cat_name";