http://benrlodge.github.io/isotopeSearchFilter/
Load the isotope plugin and then you can just chain isotopeSearchFilter() right onto it like you can see below.
If your sorting containers use images, I recommend David DeSandro's imagesloaded.
$(document).ready(function(){
var $container = $('.item-container')
$container.isotope({
itemSelector: '.item',
layoutMode: 'fitRows'
}).isotopeSearchFilter();
})
Options available to override include the name of the container that includes your items, and the text input box. See the source for more detail.
isotopeSearchFilter({
itemsContainer : $(".item-container"),
inputSearch : $('#search-term'),
})