Index: category.php
===================================================================
--- category.php	(revision 4005)
+++ category.php	(working copy)
@@ -114,6 +114,7 @@
 			wp_cache_add($category, $_category, 'category');
 		}
 	}
+	$_category = apply_filters('get_category', $_category);
 
 	if ( $output == OBJECT ) {
 		return $_category;