Hide URL SonataBundle / Symfony

The problem is that I have a page which always shows %code% in the browser, regardless of the template you are viewing, when I add the "admin" %code% , load the dasboard of the SonataBundle and the URL is like this %code% , up to here all good, the problem is that when I start to move through the Sonata, the URL starts to show always in the uta that I am and I would like to always show this %code% route despite changing Sonata templates.

Looking've come to the conclusion that as I wanted it "can not" is usually done by the server, either Apache "mod_rewrite" or IIS with "URL Rewrite" and is the solution that I have chosen.