html - Need to add links to a gallery -

was doing tutorial image gallery , got way wanted doesn't work when try add links. ideas try?

http://codepen.io/cwilliams23/pen/ofzab?editors=110

this code each thumbnail , image, first link thumbnail , second main picture:

<input type="radio" name="slide_switch" id="id4"/> <label for="id4">     <img src="image/url/link" width="100"/>up </label> <img src="image/url/link"/> 

to add link pictures need add following code. <a href="http://www.whateveryourlinkisgoeshere.com";>up</a>

<input type="radio" name="slide_switch" id="id4"/> <label for="id4">     <a href="http://www.whateveryourlinkisgoeshere.com";><img src="image/url/link" width="100"/>up</a> </label> <img src="image/url/link"/>