If the goal is to pass parameters via a link there aren't too many options: put them in the URL, have them already in session, or possibly use Ajax depending on your requirements. If you use Ajax they'll still be visible if the user is using a proxy, Firebug, etc.
I’ve looked at a lot of different solutions, and in my humble opinion Aspose is the way to go. Here’s the link: http://aspose.com
subject: Call Action Class Using Anchor Tag Without showing parameter list in address bar of the browser