$('#menu').on('mouseover', '> li', function(e) {
    # attach hover event to the menu, and check which LI you are hovering
    if (!$(this).hasClass('.current)')) {
        $('.current', '#menu').removeClass('active');
    }
}).on('mouseout', '> li', function (e) {
    if (!$(this).hasClass('.current)')) {
        $('.current', '#menu').addClass('active');
    }
});