Htaccess

RewriteEngine on
RewriteRule ^kategori/(.*)$ kategori.php?kat_id=$1 [L,NC]

kategori.php

<div id="content">
  <div class="top">
    <h1> E-Ticaret Sistemleri</h1>
  </div>
  <div class="middle">
  <div>
   <!-- Slide Buraya -->
   <script type="text/javascript" src="banner-js.js"></script>
   <div id="flashcontent" align="center">
      <script type="text/javascript">
         var so = new SWFObject("flash_banner.swf", "mymovie", "558", "300", "8");
         so.addParam("menu", "false");
         so.write("flashcontent");
      </script>
   </div>
</div>
 <?php 
 $kategori_id = $_GET["kat_id"];
 $query = mysql_query("SELECT * FROM kategoriler WHERE kategori_id = '$kategori_id'");
 $listele=mysql_fetch_array($query)
 ?>
  <div class="heading"><?=$listele["kategori_adi"]?></div>
 
    <table class="list">
            <tr>
             <?php
  $urun_kid=$_GET['kat_id']; 
  $query  = mysql_query("SELECT * FROM urun WHERE urun_kid='$urun_kid' ORDER BY urun_id DESC LIMIT 18");
  if(mysql_num_rows($query)==0) echo "<br/><br/><div class=warning><center><font face=\"Arial, Helvetica, sans-serif\" size=\"1\">Bu kategoriye daha önce ürün eklenmemiş...</font></center></div>";
  while($listele=mysql_fetch_array($query)){
	  if($listele%3==0){
		  echo "</tr><tr>";
	  }
  
  ?>
                <td style="width: 25%;">         
		 <a href="urun-detay.php?urun_id=<?= $listele["urun_id"]?>"><img src="admin/<?=$listele["urun_resim"]?>" width="116" height="102" border="0"/></a><br />
          <img src="catalog/view/theme/smrel/image/yeni_.gif" alt=""/><br>	 
		<a href="urun-detay.php?urun_id=<?= $listele["urun_id"]?>"><?= $listele["urun_baslik"] ?></a><br />
                              <span style="color: #1D3044; font-size: 20px; font-weight: bold;"><?= $listele["urun_fiyat"] ?>
                              TL + KDV</span><br />
              <a href="urun-detay.php?urun_id=<?= $listele["urun_id"]?>"><img src="catalog/view/theme/smrel/image/view.gif" alt="" class="icon" /></a>
               <?php $listele++;}?>
              </td></tr>
      </table>
  </div>
  <div class="bottom">&nbsp;</div>
</div>
  <?php include ("footer.php");?>
</div>
</body>
<meta http-equiv="content-type" content="text/html;charset=utf-8">
</html>

kategori leri siteadi.com/kategori/kategori-adi olarak getirmek istiyorum
Sonuç : Not Found