通过ajax和json获取php循环

im trying to get php loop by ajax without refreshing page. I have this php loop for day time.

    $druh = $_POST['druh'];
if ($druh == 30) {
    $sekundy = 1800;
}
else {
    $sekundy = 3600;
}


$datum = $date_final;
$iTimestamp = mktime(1,0,0,1,1,2014);
for ($i = 1; $i < 25; $i++) {
    $vypis = $datum.' '.date('H:i:s', $iTimestamp) . "
<br />";
    $iTimestamp += $sekundy;
    echo $vypis;
}

this code give me this result -

2014-06-02 01:00:00 
2014-06-02 02:00:00 
2014-06-02 03:00:00 
2014-06-02 04:00:00 
2014-06-02 05:00:00 
2014-06-02 06:00:00 
2014-06-02 07:00:00 
2014-06-02 08:00:00 
2014-06-02 09:00:00 
2014-06-02 10:00:00 
2014-06-02 11:00:00 
2014-06-02 12:00:00 
2014-06-02 13:00:00 
2014-06-02 14:00:00 
2014-06-02 15:00:00 
2014-06-02 16:00:00 
2014-06-02 17:00:00 
2014-06-02 18:00:00 
2014-06-02 19:00:00 
2014-06-02 20:00:00 
2014-06-02 21:00:00 
2014-06-02 22:00:00 
2014-06-02 23:00:00 
2014-06-02 00:00:00 

And last one is my ajax code -

$(function(){
  $("#obojebtn2").click(function(){
   $('#stkbtn2').fadeOut(300);
   $('#emisebtn2').fadeOut(300);
     $('#obojebtn2').fadeOut(300);
       $('#jinebtn2').fadeOut(300);
    $.ajax({
   url: 'http://podivej.se/script_cas.php',
   data: {druh: '60'},
   type: "POST",
   datatype: 'json',
   success: function(data){
            $('#result').html();   
   }
   });

  });
});

I need in the #result div show this php loop after sumbit a button - #obojebtn2. I google a lot and i found that i have to you JSON encode for it but i really dont know how to use it on loop.

Can you give me any advice?