Page Forwarding options for Menus

Is there a way to forward a menu option to another Word Press Site. For example I have http://www.massagetx.com as my main site that people us appointments + to book on, however, I need to change the style and options of appointments + for a different Location so I need a new Word Press site with different appointment + settings but I still want people to be able to see that that location is an option from the main massagetx.com site. But when the click on the Menu of the main one it directs them to the other WP site (like a subdomain).
Thanks,
Matt