if ($filterType == 'All') {

// assign all li items to the $filteredData var when

// the 'All' filter option is clicked

var $filteredData = $data.find('li[data-type]');

} 

else {

// find all li elements that have our required $filterType

// values for the data-type element

var $filteredData = $data.find('li[data-type="' + $filterType + '"]');

}

Thanks in advance :)