$(document).ready(function() {

    function EvenHeight(selector) {  
        var tallest = 0;
        $(selector).each(function() {
            var divHeight = $(this).height();
            if (divHeight > tallest) {
                tallest = divHeight;
            }
        });
        $(selector).each(function() {
            $(selector).height(tallest); 
        });           
    }
    
    EvenHeight("div.row-1 ul");
    EvenHeight("div.row-2 ul");
    EvenHeight("div.row-3 ul");        

});