create own library: http://codeigniter.com/user_guide/general/creating_libraries.html external library - if don't want to create another php file just for css or js They try this: http://codeigniter.com/forums/viewthread/101236/ If run into any URI issue: external->run(); ?> ? to /: (auto -> query_string, or try any others) $config['uri_protocol'] = "query_string";