This solution is work 100%
For example
if you want pass filter category from diffrent page then write as below
http://www.dotsdesign.tv/ipltest/rs-mobile-plinth.php#infographic
on isotope this page
http://www.dotsdesign.tv/ipltest/rs-case-studies-grid.php
<ul class="filters">
<li class="filter selected"><a href="#" data-filter="*">All</a></li><br>
<li class="filter"><a href="#" data-filter=".isotope-category-
infographic">Infographic</a></li>
<li class="filter"><a href="#" data-filter=".isotope-category-
motiongraphic">Motion graphic</a></li>
</ul>
<ul id="portfolio" class="masonry-grid ">
<li class="masonry-grid-item isotope-category-infographic">infographic
data</li>
<li masonry-grid-item isotope-category-motiongraphic>motion graphic
data</li>
</ul>
Now write below code in jquery:
$(window).load(function(){
var hashID = window.location.hash.substring(1);
/*$container is an isotope container.it may be different
a container is a wrapper for filter data
here is masonry-grid is a container*/
$container.isotope({ filter: ".isotope-category-"+hashID });
/*other filter selected logic you can apply to your HTML structure here*/
});