I need multiple choices filter result in Layered Navigation. I have tried this link Layered navigation - multiple attribute choices
But I cant change the getUrl() method in app\code\core\Mage\Catalog\Model\Layer\Filter\Item.php
I need to pass multi attributes like this http://192.168.1.63/project/index.php/mobiles.html?product_country=4457&product_country=4459
Anyone please suggest? Can anyone explain in detail, Can anyone give that code, where I need to change?