ここでjsfiddleを作成しました
http://jsfiddle.net/rtP9c/8/
それが役立つかどうかを確認してください
<div id="email">
To <div class="template name">2</div><br/>
I am Jack's email template. I am a unique and beautiful <div class="template insect"></div>. Did you know that you are not your <div class="template possession"></div>.<br>
From <div class="template from"></div>
</div>
JS:
var email = {
    name : 'Tyler', 
    insect : 'butterfly', 
    possession : 'Khaki Pants', 
    from : 'Narrator'
};
$('.template').each(function(k,v){
   var template = $(this).attr('class').split(' ')[1];
    $(this).text(email[template]);
});
またはAJAXを介して:
   $.ajax({
      url: 'http://site.com'
      dataType: 'json',
      data : data,
      success: function(data) {
        $('.template').each(function(k,v){
            var template = $(this).attr('class').split(' ')[1];
            $(this).text(data[template]);
        });        
      },
      error: function(status) {
        console.log(status);
      }
    });