[css] How to make jQuery UI nav menu horizontal?

I just been for 3 days looking for a jquery UI and CSS solution, I merge some code I saw, fix a little, and finally (along the other codes) I could make it work!

http://jsfiddle.net/Moatilliatta/97m6ty1a/

<ul id="nav" class="testnav">
    <li><a class="clk" href="#">Item 1</a></li>
    <li><a class="clk" href="#">Item 2</a></li>
    <li><a class="clk" href="#">Item 3</a>
        <ul class="sub-menu">
            <li><a href="#">Item 3-1</a>
                <ul class="sub-menu">
                    <li><a href="#">Item 3-11</a></li>
                    <li><a href="#">Item 3-12</a>
                        <ul>
                            <li><a href="#">Item 3-111</a></li>                         
                            <li><a href="#">Item 3-112</a>
                                <ul>
                                    <li><a href="#">Item 3-1111</a></li>                            
                                    <li><a href="#">Item 3-1112</a></li>                            
                                    <li><a href="#">Item 3-1113</a>
                                        <ul>
                                            <li><a href="#">Item 3-11131</a></li>                           
                                            <li><a href="#">Item 3-11132</a></li>                           
                                        </ul>
                                    </li>                           
                                </ul>
                            </li>
                            <li><a href="#">Item 3-113</a></li>
                        </ul>
                    </li>
                    <li><a href="#">Item 3-13</a></li>
                </ul>
            </li>
            <li><a href="#">Item 3-2</a>
                <ul>
                    <li><a href="#."> Item 3-21 </a></li>
                    <li><a href="#."> Item 3-22 </a></li>
                    <li><a href="#."> Item 3-23 </a></li>
                </ul>   
            </li>
            <li><a href="#">Item 3-3</a></li>
            <li><a href="#">Item 3-4</a></li>
            <li><a href="#">Item 3-5</a></li>
        </ul>
    </li>
    <li><a class="clk" href="#">Item 4</a>
        <ul class="sub-menu">
            <li><a href="#">Item 4-1</a>
                <ul class="sub-menu">
                    <li><a href="#."> Item 4-11 </a></li>
                    <li><a href="#."> Item 4-12 </a></li>
                    <li><a href="#."> Item 4-13 </a>
                        <ul>
                            <li><a href="#."> Item 4-131 </a></li>
                            <li><a href="#."> Item 4-132 </a></li>
                            <li><a href="#."> Item 4-133 </a></li>
                        </ul>
                    </li>
                </ul>
            </li>
            <li><a href="#">Item 4-2</a></li>
            <li><a href="#">Item 4-3</a></li>
        </ul>
    </li>
    <li><a class="clk" href="#">Item 5</a></li>
</ul>

javascript

$(document).ready(function(){

var menu = "#nav";
var position = {my: "left top", at: "left bottom"};

$(menu).menu({

    position: position,
    blur: function() {
        $(this).menu("option", "position", position);
        },
    focus: function(e, ui) {

        if ($(menu).get(0) !== $(ui).get(0).item.parent().get(0)) {
            $(this).menu("option", "position", {my: "left top", at: "right top"});
            }
    }
});     });

CSS

.ui-menu {width: auto;}.ui-menu:after {content: ".";display: block;clear: both;visibility: hidden;line-height: 0;height: 0;}.ui-menu .ui-menu-item {display: inline-block;margin: 0;padding: 0;width: auto;}#nav{text-align: center;font-size: 12px;}#nav li {display: inline-block;}#nav li a span.ui-icon-carat-1-e {float:right;position:static;margin-top:2px;width:16px;height:16px;background:url(https://www.drupal.org/files/issues/ui-icons-222222-256x240.png) no-repeat -64px -16px;}#nav li ul li {width: 120px;border-bottom: 1px solid #ccc;}#nav li ul {width: 120px; }.ui-menu .ui-menu-item li a span.ui-icon-carat-1-e {background:url(https://www.drupal.org/files/issues/ui-icons-222222-256x240.png) no-repeat -32px -16px !important;

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