Render a PHP menu in rails template

I need to integrate some RoR generated pages into a Drupal website. My
idea is to re-use the PHP files that make up the layout of the Drupal
site in the Rails template files. So instead of rendering the menu in
a partial, I want it to use the menu PHP file. I want to do this so
changes to the menu only needs to happen in one spot. Any ideas?

Thanks in advance,