I am wondering if anyone is able to code an additional feature for "Custom Fields" ? Description: I do have a "custom field" at which a user enters a URL to his website. Now I would like to change this URL and include my "Affiliate ID" towards the URL. But I would like to have my "Affiliate ID" not being visible at the URL-string. Example: My Affiliate URL: www.shopping-center.com/?ref=partner-777 The URL which should be visible to the user: www.shopping-center.com Literally not showing the real full URL to the user. It should be only possible for "Admin" to be able to change the URL in this way.