<link href="//maxcdn.bootstrapcdn.com/bootstrap/3.3.0/css/bootstrap.min.css" rel="stylesheet" id="bootstrap-css">
<script src="//maxcdn.bootstrapcdn.com/bootstrap/3.3.0/js/bootstrap.min.js"></script>
<script src="//code.jquery.com/jquery-1.11.1.min.js"></script>
<!------ Include the above in your HEAD tag ---------->
<div class="container-fluid">
<nav>
<ul>
<li>
<a href="#">Dropdown1</a>
<ul>
<li><a href="#">Option1</a></li>
<li><a href="#">Option2 A Long One</a></li>
<li><a href="#">Option3</a></li>
</ul>
</li>
<li>
<a href="#">Dropdown2</a>
<ul>
<li><a href="#">Option1</a></li>
<li><a href="#">Option2</a></li>
<li><a href="#">Option3</a></li>
</ul>
</li>
<li>
<a href="#">Dropdown3</a>
<ul>
<li><a href="#">Option1</a></li>
<li><a href="#">Option2</a></li>
<li><a href="#">Option3</a></li>
</ul>
</li>
</ul>
</nav>
</div>
html {
text-align: center;
}
nav {
width: 100%;
height: auto;
background-color: #BB0927;
}
nav ul,
nav li {
list-style: none;
padding: 0;
margin: 0;
}
nav a {
color: #fff;
text-decoration: none;
}
nav > ul > li {
display: inline-block;
position: relative;
margin: 1em;
}
nav > ul > li > a {
padding-bottom: 5px;
}
nav > ul > li > ul {
display: none;
position: absolute;
background-color: #BB0927;
top: 40px;
padding: 10px 0;
}
nav > ul > li > ul > li {
white-space: nowrap;
padding: 7px 15px;
}
nav > ul > li > ul > li > a {
display: block;
}
nav > ul > li > ul > li > a:hover {
text-decoration: underline;
}
nav > ul > li > ul:after {
position: absolute;
left: 50%;
margin-left: -10px;
top: -8px;
width: 0;
height: 0;
content:'';
border-left: 10px solid transparent;
border-right: 10px solid transparent;
border-bottom: 10px solid #BB0927;
}
nav > ul > li:hover > ul {
display:block;
}