jQuery Photo Wall Plugin won't reinit after ajax load

jQuery Photo Wall Plugin won't reinit after ajax load

I’m using this jQuery Photowall Plugin I was able to modify the code so I could switch out the contents of the gallery with a select drop down menu. You can see the page here.

This works fine but following a load the photowall plugin no longer works.

I’ve copied the init code into a function that I call at the start and this works and then I call again at the end of my onchange but it won’t work.

Any ideas as to why this isn’t working? as always any tips massively appreciated.

Thanks, should also say that I'm prepared to pay anyone who can get this working for me as I really need to get this sorted.

My code:

http://codepen.io/qwerty-design/pen/Fjebd