$query = mysql_query("SELECT * FROM diziler");
$say = 1;
if ( mysql_affected_rows() ){
     while ( $row = mysql_fetch_assoc($query) ){
		 if($say == 3){
		   echo $row['bolumAdi']."<br />";
		   $say = 1;
		  }
		  else{
		  echo $row['bolumAdi'];
		  $say++;
		  }
     }
}