$sql=mysql_query("select id,kat_id from konular where kat_id='$id' ");
  while($row=mysql_fetch_array($sql)){
  $kat_id=$row['id'];
  while($bul=mysql_fetch_array(mysql_query("select * from kategoriler where id='kat_id'"))){
 echo $bul["kategori_adi"];
};
    }