how to add div tag to field collection
We need to write a hook_form_alter();
In my case , 

function mymodule_form_alter($form,$form_state,$form_id) {
  form['rmr_bar_li'][und][0]['anyfield']['#suffix'] = &lt;div class = 'class name'&gt;&lt;/div&gt;;
} 


Here anyfield is field inside the field collection below which you have to place your DIV tag.