Menu Dropdown Jquery

Boa noite, estou com um pequeno problema, estou criando um menu na horizontal, com dropdown ao clicar. Quando eu clico em uma opção, o dropdown abre normal, quando clico na outra, abre normal também, porém o dropdown anterior aberto não fecha. Alguma ideia de como fechar ao clicar na outra opção? Não sou muito bom em programação, tanto que no exemplo fiz um comando jquery para cada opção do menu.
OBS: Se clicar fora, em qualquer área os dropdowns abertos fecham.

html:

 <section class="main">
 <div class="wrapper-demo">
 <div id="dd" class="wrapper-dropdown-5" tabindex="1">John Doe
 <ul class="dropdown">
 <li><a href="#"><i class="icon-user"></i>Profile</a></li>
 <li><a href="#"><i class="icon-cog"></i>Settings</a></li>
 <li><a href="#"><i class="icon-remove"></i>Log out</a></li>
 </ul>
 </div>
 ​</div>
 </section>

 </br></br></br></br></br></br>

 <section class="main">
 <div class="wrapper-demo">
 <div id="dd" class="wrapper-dropdown-5" tabindex="1">John Doe
 <ul class="dropdown">
 <li><a href="#"><i class="icon-user"></i>Profile</a></li>
 <li><a href="#"><i class="icon-cog"></i>Settings</a></li>
 <li><a href="#"><i class="icon-remove"></i>Log out</a></li>
 </ul>
 </div>
 ​</div>
 </section>

css:

.wrapper-dropdown-5 {
 /* Size & position */
 position: relative;
 width: 200px;
 margin: 0 auto;
 padding: 12px 15px;

 /* Styles */
 background: #fff;
 border-radius: 5px;
 box-shadow: 0 1px 0 rgba(0,0,0,0.2);
 cursor: pointer;
 outline: none;
 -webkit-transition: all 0.3s ease-out;
 -moz-transition: all 0.3s ease-out;
 -ms-transition: all 0.3s ease-out;
 -o-transition: all 0.3s ease-out;
 transition: all 0.3s ease-out;
}

.wrapper-dropdown-5:after { / Little arrow /

 content: "";
 width: 0;
 height: 0;
 position: absolute;
 top: 50%;
 right: 15px;
 margin-top: -3px;
 border-width: 6px 6px 0 6px;
 border-style: solid;
 border-color: #4cbeff transparent;
}

.wrapper-dropdown-5 .dropdown {
/ Size & position /

 position: absolute;
 top: 100%;
 left: 0;
 right: 0;

 /* Styles */
 background: #fff;
 border-radius: 0 0 5px 5px;
 border: 1px solid rgba(0,0,0,0.2);
 border-top: none;
 border-bottom: none;
 list-style: none;
 -webkit-transition: all 0.3s ease-out;
 -moz-transition: all 0.3s ease-out;
 -ms-transition: all 0.3s ease-out;
 -o-transition: all 0.3s ease-out;
 transition: all 0.3s ease-out;

 /* Hiding */
 max-height: 0;
 overflow: hidden;
}

.wrapper-dropdown-5 .dropdown li {

 padding: 0 10px ;
}

.wrapper-dropdown-5 .dropdown li a {

 display: block;
 text-decoration: none;
 color: #333;
 padding: 10px 0;
 transition: all 0.3s ease-out;
 border-bottom: 1px solid #e6e8ea;
}

.wrapper-dropdown-5 .dropdown li:last-of-type a {

 border: none;
}

.wrapper-dropdown-5 .dropdown li i {

 margin-right: 5px;
 color: inherit;
 vertical-align: middle;
}

/ Hover state /

.wrapper-dropdown-5 .dropdown li:hover a {

 color: #57a9d9;
}

/ Active state /

.wrapper-dropdown-5.active {

 border-radius: 5px 5px 0 0;
 background: #4cbeff;
 box-shadow: none;
 border-bottom: none;
 color: white;
}

.wrapper-dropdown-5.active:after {

 border-color: #82d1ff transparent;
}

.wrapper-dropdown-5.active .dropdown {

 border-bottom: 1px solid rgba(0,0,0,0.2);
 max-height: 400px;
}

/ No CSS3 support: none /

jquery:

 function DropDown(el) {
 this.dd = el;
 this.initEvents();
 }
 DropDown.prototype = {
 initEvents : function() {
 var obj = this;

 obj.dd.on('click', function(event){
 $(this).toggleClass('active');
 event.stopPropagation();
 });
 }
 }

 $(function() {

 var dd = new DropDown( $('#dd') );

 $(document).click(function() {
 // all dropdowns
 $('.wrapper-dropdown-5').removeClass('active');
 });

 });