upgrade to rails3, but grip is broken

app/helpers/admin_helper.rb

@@ -2,7 +2,7 @@ module AdminHelper
   
   def show_parent_items_link(parent_item)  
     @parent_items = @parent_item.ancestors.map{ |i| i.name }
-    ( @parent_items.map{ |i| link_to(i, admin_items_path(:parent_name=>i) ) } << parent_item.name ).join("/")
+    ( @parent_items.map{ |i| link_to(i, admin_items_path(:parent_name=>i) ) } << parent_item.name ).join("/").html_safe
   end
   
 end