class mymodel(models.Model):
     foo = models........


 def get_cname(self):
    class_name = ....
    return class_name

class mymodel(models.Model):
     foo = models........


 def get_cname(self):
    class_name = ....
    return class_name

{% for obj in objects %}
   <div class="{{obj.get_cname}}">
     ..
  </div>
{% endfor }}