WHM Plugin written in Symfony

I've written a WHM plugin to manage blacklist/whitelist of outgoing IPs for our Exim server (and other spam control features we use). This plugin is written in PHP using the Symfony framework. This framework relies on the ability to rewrite URLs so all requests are handled by a single index.php file. This is usually done using Apache's .htaccess file with mod_rewrite. I now realized that WHM runs its own webserver. Is there a way/trick/hackity hack to achieve the same result as Apache's mod_rewrite using cpsrv and CGI?