QUESTION Modify output of get_navigation

[shawn_a]

You could use your own get_navigation function... Its your theme, you can add your own functions to it.
Or just use the menu-items filter and regex the whole thing, or dom import it.

I also see no reason for modifying the htaccess file. Why do you need to do that when you have a
indexid and a data_index filter, plus all your pages are on index so your not even using urls.