dhtmlx/memo

$dbh = new PDO($dsn, $user, $password);
$sql="SELECT prefectures_code,count(site) as sites FROM municipality_info";
$sth = $dbh->prepare($sql);
$sth->execute();
$n=1;
$row = array();
while($res = $sth->fetch(PDO::FETCH_ASSOC)){
  $row[] = array( "id"=>$n, "data"=> array($res['prefectures_code'], $res['sites']) );
  $n++;
}
echo json_encode( array("rows"=>$row) );

php
  echo json_encode( array( array("rows"=>$row1), array("rows"=>$row2) ) );
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dhtmlx
  $.ajax({
     type:"POST",url:"sql.php",data:{"query":myForm.getItemValue("search")}
  }).done(function(res){
     data_arr = JSON.parse(res);
     dhtmlxgrid1.parse(data_arr[0],"json");
     dhtmlxgrid2.parse(data_arr[1],"json");
  });

popupWindow = myLayout.dhxWins.createWindow( "popup" , 1, 1, 800, 500);