$(document).ready(function() {
    var $active = $('.menu a.selected');
    var $all = $('.menu a');
    var path = location.pathname;
    var mainpath;
    if (path.indexOf('/') != -1) {
        mainpath = path.split('/')[1];
    }
    else {
        mainpath = path;
    }

    $active.removeClass('selected');
    $all.each(function() {
        if (this.id == mainpath) {
            $('#' + this.id).addClass('selected');
        }
    });

});