<nav id="cbp-hrmenu" class="cbp-hrmenu">
    <ul>
        <li>
            <a href="#">Products</a>
            <div class="cbp-hrsub">
                <div class="cbp-hrsub-inner">
                    <div>
                        <h4>Learning & Games</h4>
                        <ul>
                            <li><a href="#">Catch the Bullet</a></li>
                            <li><a href="#">Snoopydoo</a></li>
                            <!-- ... -->
                        </ul>
                    </div>
                    <div>
                        <h4>Utilities</h4>
                        <ul>
                            <li><a href="#">Gadget Finder</a></li>
                            <li><a href="#">Green Tree Express</a></li>
                            <li><a href="#">Green Tree Pro</a></li>
                            <li><a href="#">Wobbler 3.0</a></li>
                            <li><a href="#">Coolkid</a></li>
                        </ul>
                    </div>
                    <div>
                        <!-- ... -->
                    </div>
                </div><!-- /cbp-hrsub-inner -->
            </div><!-- /cbp-hrsub -->
        </li>
        <li><!-- ... --></li>
        <li><!-- ... --></li>
        <!-- ... -->
    </ul>
</nav>

.cbp-hrmenu {
 width: 100%;
 margin-top: 2em;
 border-bottom: 4px solid #47a3da;
}
 
/* general ul style */
.cbp-hrmenu ul {
 margin: 0;
 padding: 0;
 list-style-type: none;
}
 
/* first level ul style */
.cbp-hrmenu > ul,
.cbp-hrmenu .cbp-hrsub-inner {
 width: 90%;
 max-width: 70em;
 margin: 0 auto;
 padding: 0 1.875em;
}
 
.cbp-hrmenu > ul > li {
 display: inline-block;
}
 
.cbp-hrmenu > ul > li > a {
 font-weight: 700;
 padding: 1em 2em;
 color: #999;
 display: inline-block;
}
 
.cbp-hrmenu > ul > li > a:hover {
 color: #47a3da;
}
 
.cbp-hrmenu > ul > li.cbp-hropen a,
.cbp-hrmenu > ul > li.cbp-hropen > a:hover {
 color: #fff;
 background: #47a3da;
}
 
/* sub-menu */
.cbp-hrmenu .cbp-hrsub {
 display: none;
 position: absolute;
 background: #47a3da;
 width: 100%;
 left: 0;
}
 
.cbp-hropen .cbp-hrsub {
 display: block;
 padding-bottom: 3em;
}
 
.cbp-hrmenu .cbp-hrsub-inner > div {
 width: 33%;
 float: left;
 padding: 0 2em 0;
}
 
.cbp-hrmenu .cbp-hrsub-inner:before,
.cbp-hrmenu .cbp-hrsub-inner:after {
 content: " ";
 display: table;
}
 
.cbp-hrmenu .cbp-hrsub-inner:after {
 clear: both;
}
 
.cbp-hrmenu .cbp-hrsub-inner > div a {
 line-height: 2em;
}
 
.cbp-hrsub h4 {
 color: #afdefa;
 padding: 2em 0 0.6em;
 margin: 0;
 font-size: 160%;
 font-weight: 300;
}
 
/* Examples for media queries */
 
@media screen and (max-width: 52.75em) { 
 
 .cbp-hrmenu {
 font-size: 80%;
 }
 
}
 
@media screen and (max-width: 43em) { 
 
 .cbp-hrmenu {
 font-size: 120%;
 border: none;
 }
 
 .cbp-hrmenu > ul,
 .cbp-hrmenu .cbp-hrsub-inner {
 width: 100%;
 padding: 0;
 }
 
 .cbp-hrmenu .cbp-hrsub-inner {
 padding: 0 2em;
 font-size: 75%;
 }
 
 .cbp-hrmenu > ul > li {
 display: block;
 border-bottom: 4px solid #47a3da;
 }
 
 .cbp-hrmenu > ul > li > a {
 display: block;
 padding: 1em 3em;
 }
 
 .cbp-hrmenu .cbp-hrsub {
 position: relative;
 }
 
 .cbp-hrsub h4 {
 padding-top: 0.6em;
 }
 
}
 
@media screen and (max-width: 36em) {
 .cbp-hrmenu .cbp-hrsub-inner > div {
 width: 100%;
 float: none;
 padding: 0 2em;
 }
}

var cbpHorizontalMenu = (function() {
 
    var $listItems = $( '#cbp-hrmenu > ul > li' ),
        $menuItems = $listItems.children( 'a' ),
        $body = $( 'body' ),
        current = -1;
 
    function init() {
        $menuItems.on( 'click', open );
        $listItems.on( 'click', function( event ) { event.stopPropagation(); } );
    }
 
    function open( event ) {
 
        if( current !== -1 ) {
            $listItems.eq( current ).removeClass( 'cbp-hropen' );
        }
 
        var $item = $( event.currentTarget ).parent( 'li' ),
            idx = $item.index();
 
        if( current === idx ) {
            $item.removeClass( 'cbp-hropen' );
            current = -1;
        }
        else {
            $item.addClass( 'cbp-hropen' );
            current = idx;
            $body.off( 'click' ).on( 'click', close );
        }
 
        return false;
 
    }
 
    function close( event ) {
        $listItems.eq( current ).removeClass( 'cbp-hropen' );
        current = -1;
    }
 
    return { init : init };
 
})();