[рони]

VasyOK,

$(function() {
    var tab = $("#tabs"), activate;
    function tabs_behavior() {
        var min = $(window).width() < 600;
        if (min && !activate) {
            tab.tabs();
            activate = true
        } else if (!min && activate) {
            tab.tabs("destroy");
            activate = false
        }
    }
    tabs_behavior();
    $(window).resize(tabs_behavior)
});