Jquery弹出不正确的工作在PHP foreach

我正在使用这个jquery弹出窗口

 $(document).ready(function() {
 // Here we will write a function when link click under class popup                   
$('a.popup').click(function() {

 // Here we will describe a variable popupid which gets the
// rel attribute from the clicked link                            
var popupid = $(this).attr('rel');

// Now we need to popup the marked which belongs to the rel attribute
// Suppose the rel attribute of click link is popuprel then here in below code
// #popuprel will fadein
$('#' + popupid).fadeIn();

  // append div with id fade into the bottom of body tag
 // and we allready styled it in our step 2 : CSS
  $('body').append('<div id="fade"></div>');
  $('#fade').css({'filter' : 'alpha(opacity=80)'}).fadeIn();

  // Now here we need to have our popup box in center of 
  // webpage when its fadein. so we add 10px to height and width 
   var popuptopmargin = ($('#' + popupid).height() + 10) / 2;
  var popupleftmargin = ($('#' + popupid).width() + 10) / 2;

  // Then using .css function style our popup box for center allignment
   $('#' + popupid).css({
 'margin-top' : -popuptopmargin,
  'margin-left' : -popupleftmargin
   });
    });

   // Now define one more function which is used to fadeout the 
  // fade layer and popup window as soon as we click on fade layer
   $('#fade').click(function() {

   // Add markup ids of all custom popup box here                           
   $('#fade , #popuprel , #popuprel2 , #popuprel3').fadeOut()
    return false;
     });
    });

这是我foreach循环中的PHP和HTML代码

             <?php foreach($items as $item){ ?>
             <a rel="popuprel" class="popup">click hier</a>
             <div class="popupbox" id="popuprel">
            <div id="intabdiv">
               <?php echo $item->description; ?>
              </div>
             </div>
            <div id="fade"></div>
           <?php } ?>

现在，当点击并显示弹出窗口只回声一个项目的所有项目的描述，但我想回声每个项目的每个项目的描述。