kodları bununla değiştirip dener misin
edit : metadige'nin dediği gibi replace de ekledim
<?php
include_once("veri_tabani.php");
header('Content-type: text/xml');
echo '<?xml version="1.0" encoding="ISO-8859-9"?>
<urlset xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.sitemaps.org/schemas/sitemap/0.9 http://www.sitemaps.org/schemas/sitemap/0.9/sitemap.xsd" xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">';
echo "\t<url>\n";
echo "\t\t<loc>http://www.siteadi.com</loc>\n";
echo "\t\t<changefreq>daily</changefreq>\n";
echo "\t\t<priority>1.00</priority>\n";
echo "\t</url>\n";
$result = @mysql_query("SELECT id, link FROM jos_menu WHERE published='1' ORDER BY id DESC");
while(list($id, $link) = mysql_fetch_row($result)) {
$link = str_replace('&','&',$link);
echo "\t<url>\n";
echo "\t\t<loc>http://www.siteadi.com/".$link."</loc>\n";
echo "\t\t<changefreq>weekly</changefreq>\n";
echo "\t\t<priority>0.50</priority>\n";
echo "\t</url>\n";
}
echo "</urlset>";
?>