Show different domain, but real URI?

We have a site which requires SSL; however we don't have an SSL certificate for the domain we'd like to be viewed by the end user. If we wrote an iRule, to show the domain in the URL of which we don't own an SSL cert, this would NOT work, right?

 

 

We have made this work with iframing (although in this case, the URI in the browser URL bar remains static), where the site being framed does have an SSL cert, but the page in the URL bar does not. However my understanding is that with an iRule, it won't work this way. Could anyone confirm or deny this?

 

 

Also what would the iRule to do this (Show different domain, but real URI?) be done?