Router.php

class Router {
	public $routes;
	function Router( $map ) {
    	$this->routes = $map;
    	add_filter( 'parse_request' , array( &$this , 'request_parser' ) );
    	
    }

    function request_parser($params) {

    	$url = $params->request;
    	$pattern = '|^'.$url.'$|';

    	foreach($this->routes as $from => $to){
			$args[$key] = $this->altArgs[$key];
			
			preg_match($pattern, $from, $matches);
			if(!empty($matches)){

				wp_redirect( $to ); 
				exit;
			}
		}
    }
}