How to pass value of dropdown to instafeed tagName property

I am using instafeedjs to show image based on tags. i want to add functionality to it so that it will show image based on the drop-down selection

<div class="instaTagsdd">
 <select>
  <option value="volvo">Volvo</option>
  <option value="saab">Saab</option>
  <option value="mercedes">Mercedes</option>
  <option value="audi">Audi</option>
</select> </div>

http://codepen.io/anon/pen/VLpwoo