php - Parsing curl links and point to own server -

i'm trying set basic proxy script pull external contents , execute scripts on them. bypass same origin policy, i'm using curl fetch contents

    <?php      $url = 'http://www.mozilla.org';      $ch = curl_init();         curl_setopt($ch, curlopt_url, $url);         curl_setopt($ch, curlopt_useragent, "mozilla/1.0");         curl_setopt($ch, curlopt_header, 0);         curl_setopt($ch, curlopt_returntransfer, true);     $result= curl_exec ($ch);     curl_close ($ch);     echo $result;      ?> 

however doesn't fetch css + images etc. inserted 'base' reference points original source

    echo '<base href="http://www.mozilla.org"/>'; 

my question is, methods should use parse of css, img, , other js links on each page of pulled external content, url should like:

   http://mydomain.com/curl.php?url=http://www.mozilla.org/main-page.html/    http://mydomain.com/curl.php?url=http://www.mozilla.org/main-page.html/sub-page.html 

thanks