As mentioned in Output filter in template of layout?, output modifiers are definitely supposed to work. In your case you might need a custom one to parse it the way you want to, but the output filter on the tag itself should not be the problem.
As mentioned in Output filter in template of layout?, output modifiers are definitely supposed to work. In your case you might need a custom one to parse it the way you want to, but the output filter on the tag itself should not be the problem.