Как сделать подмену через htaccess?

<!DOCTYPE HTML>
<html>
 <head>
  <meta charset="utf-8">
  <title>Мой сайтик</title>
  <base> 
 </head>  
 <body>

<?php
    $uagent = "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; .NET CLR 1.1.4322)"; 
    $ch = curl_init();
    curl_setopt($ch, CURLOPT_URL, 'http://www.salesforce.com/platform/overview/?d=70130000000liBh');
    curl_setopt($ch, CURLOPT_HEADER, 0);
    curl_setopt($ch, CURLOPT_ENCODING, "");
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
    curl_setopt($ch, CURLOPT_USERAGENT, $uagent);
    curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 40);
    curl_setopt($ch, CURLOPT_COOKIEJAR,$_SERVER['DOCUMENT_ROOT']."/cookie.txt");
    curl_setopt($ch, CURLOPT_COOKIEFILE,$_SERVER['DOCUMENT_ROOT']."/cookie.txt");
    $data = curl_exec($ch);
    curl_close($ch);

echo $data;
?>

 </body>
</html>