Index: functions.php
===================================================================
--- functions.php	(revision 4005)
+++ functions.php	(working copy)
@@ -747,6 +747,7 @@
 			wp_cache_add($category, $_category, 'category');
 		}
 	}
+	$_category = apply_filters('get_category', $_category);
 
 	if ( !isset($_category->fullpath) ) {
 		$_category = set_category_path($_category);