Try the following. In that a tag, set the href property to the page you want to go to. Then, remove the class attribute.
<a href="/MyPage.aspx">This is my link text</a>
That should work
Open the following file :- http://granuldiskcom.hosterspace.com/Portals/_default/Skins/Flatna2/js/custom.js
Go to line number 335 and replace
And in html
<a href="#" class="overlay zoom">
update href with the url where you want to redirect instead of #.
You could change code:
<img alt="" class="item-image" src="/portals/0/Images/Accessories/GD673still.jpg" /> <a href="#" class="overlay zoom">
To this one:
<a href="/portals/0/Images/Accessories/GD673still.jpg"> <img alt="" class="item-image" src="/portals/0/Images/Accessories/GD673still.jpg" /> </a>
But it's would be link to image, not web page. If you want to get link to web page you should edit aspx files (GranuleFlexi-AccessoriesInserts.aspx for example) or create new ones. Aspx files produce html and combine it with js and css.
You will definitely need to alter some source code, and without knowing what and where to change it would be hard. I could do this for you and explain the changes, but I will need access to the code. Could you contact me for details?