I want to use a symbol (the 3 horizontal lines) in my mobile variant to bring up a vertical nav bar. I can't figure out how to do this. If I ungroup to edit graphics and replace my text with the symbol, then it is no longer a nav bar and it doesn't give me the option to make it a nav bar. Many of the mobile sites out there have this so I know it is possible..... What am I missing?

I have attached the file for your review/comments.
Website110415.xar

Thanks.

PS. I am just starting to work on the mobile part of the website, so I haven't resized any of the graphics or text yet.