AJAX投资组合页面

I have decided to create a portfolio page, however I am keen to pull the page contents similar to the below:

http://demo.themezilla.com/garnish

However I would like to create a block grid and have the AJAX container, slide down (and force content down, no overlay) below the row of the selected portfolio block. I can create the hover effect and content easy however I have only ever created separate page templates not dynamically injected content.

HTML & CSS no problem. I am working on a PHP system (probably wordpress) with jQuery as a Javascript library.

I am open to suggestions which have minimal load on the server, I don't mind handing coding (attempt to) or using a plugin.

Any help and/or direction would be greatly appreciated!

In the time it would take to get a plugin to work you could build your own solution. That would be my recommendation.