how to disable nav tab in jquery code example

Example 1: prevent click other tab bootstrap tabs

var $tabs = $('#createNotTab li');


function showPrev() {
    $tabs.filter('.active').prev('li').removeClass("disabled");
    $tabs.filter('.active').prev('li').find('a[data-toggle]').each(function () {
       $(this).attr("data-toggle", "tab");
    });

    $tabs.filter('.active').prev('li').find('a[data-toggle="tab"]').tab('show');

    $tabs.filter('.active').next('li').find('a[data-toggle="tab"]').each(function () {
        $(this).attr("data-toggle", "").parent('li').addClass("disabled");        
    })
}

function showNext() {
    $tabs.filter('.active').next('li').removeClass("disabled");
    $tabs.filter('.active').next('li').find('a[data-toggle]').each(function () {
        $(this).attr("data-toggle", "tab");
    });

    $tabs.filter('.active').next('li').find('a[data-toggle="tab"]').tab('show');

    $tabs.filter('.active').prev('li').find('a[data-toggle="tab"]').each(function () {
        $(this).attr("data-toggle", "").parent('li').addClass("disabled");;        
    })
}

Example 2: prevent click other tab bootstrap tabs

<button class="btn btn-warning prevtab" type="button" onclick="return showPrev()"><span class="glyphicon glyphicon-arrow-left"></span>Previous </button>
 <button class="btn btn-info prevtab" type="button" onclick="return showNext()"><span class="glyphicon glyphicon-arrow-right"></span>Next </button>