SO - 29388844

by Arun P Johny

HTML

<section id="menu">
    <div class="container">
        <div class="row">
            <div class="col-xs-12">
                <ul id="menu-nav" class="nav nav-pills text-center">
                    <li class="active"><h2><a href="#about" data-toggle="tab">About</a></h2></li>
                    <li><h2><a href="#services" data-toggle="tab">Services</a></h2></li>
                    <li><h2><a href="#contact"  data-toggle="tab">Contact</a></h2></li>
                </ul>
            </div>
        </div>
        <div class="row">
            <div class="col-xs-12">
                <div class="tab-content">
                    <div class="tab-pane active" id="about">
                        <div class="col-sm-8 col-sm-offset-2">
                            <p class="text-center">
                                Lorem ipsum dolor sit amet, consectetur adipisicing elit. Debitis odit id praesentium, maxime, harum corporis officia laboriosam earum laudantium mollitia et quas, iure enim expedita. Nam sit, est libero obcaecati.
                            </p>
                        </div>
                    </div>
                    
                    <div class="tab-pane" id="services">
                        <div class="col-sm-8 col-sm-offset-2">
                            <p class="text-center">
                                Lorem ipsum dolor sit amet, consectetur adipisicing elit. Debitis odit id praesentium, maxime, harum corporis officia laboriosam earum laudantium mollitia et quas, iure enim expedita. Nam sit, est libero obcaecati.
                            </p>
                        </div>
                    </div>
                    
                    <div class="tab-pane" id="contact">
                        <div class="col-sm-8 col-sm-offset-2">
                            <p class="text-center">
                                Lorem ipsum dolor sit amet, consectetur adipisicing elit. Debitis odit id praesentium, maxime, harum corporis...

JavaScript

var flag;
$(window).on('resize.menu', function () {
    var width = $(window).width(),
        $ul = $('#menu-nav');
    if (width < 768 && flag != 1) {
        flag = 1;
        $('#menu .tab-content .tab-pane').each(function () {
            $(this).appendTo($ul.find('li:has(a[href="#' + this.id + '"])'))
        });
    } else if (width >= 768 && flag != 2) {
        flag = 2;
        $ul.find('.tab-pane').appendTo('#menu .tab-content');
    }
}).trigger('resize.menu')