<header class="navbar navbar-fixed-top">
    <div class="navbar-inner">
		<div class="container">
        
            <!-- Mobile toggle button -->
            <button type="button" class="btn btn-navbar" data-toggle="collapse" data-target=".nav-collapse">
            <span class="icon-bar"></span>
            <span class="icon-bar"></span>
            <span class="icon-bar"></span>
            </button>

            <!-- Logo -->
            <a class="brand" href="#"><b>LOGO</b></a>
        
            <!-- Navigation -->
            <nav class="nav-collapse collapse">
                <ul class="nav">
                
				    <li><a href="#top">Home</a></li>
                    <li class="dropdown">
                        <a href="#" class="dropdown-toggle" data-toggle="dropdown">Mega Menu <b class="caret"></b></a>                      

						<ul class="dropdown-menu mega-menu">
    
						    <li class="mega-menu-column">
						    <ul>
						        <li class="nav-header">Mega menu 1</li>
						        <img src="http://placehold.it/150x120">
								<li><a href="#">Mega-menu link</a></li>
						        <li><a href="#">Mega-menu link</a></li>
						        <li><a href="#">Mega-menu link</a></li>
						        <li><a href="#">Mega-menu link</a></li>
						        <li><a href="#">Mega-menu link</a></li>
						        <li><a href="#">Mega-menu link</a></li>
						    </ul>
						    </li>    
        
						    <li class="mega-menu-column">
						    <ul>
						    <li class="nav-header">Mega menu 2</li>
						        <img src="http://placehold.it/150x120">
								<li><a href="#">Mega-menu link</a></li>
						        <li><a href="#">Mega-menu link</a></li>
						        <li><a href="#">Mega-menu link</a></li>
						        <li><a href="#">Mega-menu link</a></li>
						        <li><a href="#">Mega-menu link</a></li>
						        <li><a href="#">Mega-menu link</a></li>
						    </ul>
						    </li> 

						    <li class="mega-menu-column">
						    <ul>                            
						    <li class="nav-header">Mega menu 3</li>
						        <img src="http://placehold.it/150x120">
								<li><a href="#">Mega-menu link</a></li>
						        <li><a href="#">Mega-menu link</a></li>
						        <li><a href="#">Mega-menu link</a></li>
						        <li><a href="#">Mega-menu link</a></li>
						        <li><a href="#">Mega-menu link</a></li>
						        <li><a href="#">Mega-menu link</a></li>
						    </ul>
						    </li> 
							
						</ul><!-- dropdown-menu -->
						
					</li><!-- /.dropdown -->
				        
                    <li><a href="#about">About Us</a></li>                                                                               
                    <li><a href="#pricing">Our Pricing</a></li> 
                    <li><a href="#team">Our Team</a></li> 
                    <li><a href="#contact">Contact</a></li>                         
                
				</ul><!-- /.nav -->           
            </nav><!--/.nav-collapse -->
                    
        </div><!-- /.container -->
    </div><!-- /.nav-inner -->
</header>
/* page style */
a, a:focus, a:active, a:hover, object, embed { outline: none; text-decoration: none; }
:-moz-any-link:focus { outline: none; }
input::-moz-focus-inner { border: 0; }
:focus { outline: 0; }
body { background: #333; }	
.brand { padding: 10px 40px !important; }
.navbar { border-bottom: 4px solid #888; }



/* MEGA MENU STYLE
********************************/ 
.mega-menu {
	padding: 10px 0px ! important;
	width: 540px;
  border-radius: 0;
  margin-top: 0px;
	}

	.mega-menu li {
		display: inline-block;
		float: left;
		font-size: 0.94rem;
		padding: 3px 0px;
		}

		.mega-menu li.mega-menu-column {
			margin-right: 20px;
			width: 150px;
			}

			.mega-menu .nav-header {
			padding: 0 !important;
			margin-bottom: 10px;
			display: inline-block;
			width: 100%;
			border-bottom: 1px solid #ddd;
			}
      .mega-menu img { padding-bottom: 10px;}







/* Disable Toggle style
********************************/  

/* Dropdown Toggle on style */
.navbar .nav li.dropdown.open > .dropdown-toggle, 
.navbar .nav li.dropdown.active > .dropdown-toggle, 
.navbar .nav li.dropdown.open.active > .dropdown-toggle {
    background: inherit; /* Set to inherit when using mouse hover to open dropdown */
    color: inherit;
    }   
    /* Toggle off style */
    .navbar .nav li.dropdown.open.active > .dropdown-toggle,
    .navbar .nav > li.dropdown > a:focus { 
    background: inherit;
    color: inherit;
    }
    /* Toggle hover */
    .navbar .nav li.dropdown > .dropdown-toggle:hover,
    .navbar .nav li.dropdown.open > .dropdown-toggle:hover {
    background-color: #DDDDDD;
    }
            
            
    /* Toggle caret*/
    .navbar .nav li.dropdown > .dropdown-toggle .caret {
        border-bottom-color:;
        border-top-color:;
        }
        /* Toggle caret hover */
        .navbar .nav li.dropdown > a:hover .caret, 
        .navbar .nav li.dropdown > a:focus .caret {
        border-bottom-color: #333;
        border-top-color: #333;
        }
        /* Toggle caret active */
        .navbar .nav li.dropdown.open > .dropdown-toggle .caret, 
        .navbar .nav li.dropdown.active > .dropdown-toggle .caret, 
        .navbar .nav li.dropdown.open.active > .dropdown-toggle .caret {
        border-bottom-color:#333;
        border-top-color: #333;
        }



/* Hover style
********************************/ 
.navbar .nav > li > a, .mega-menu a
 { 
  -webkit-transition: all 200ms ease;
	 -moz-transition: all 200ms ease;
	  -ms-transition: all 200ms ease;
	   -o-transition: all 200ms ease;
	      transition: all 200ms ease; 
	
		 /* -webkit-transform: translate3d(0, 0, 0); Webkit Hardware Acceleration*/ 
	     -webkit-backface-visibility: hidden; /* Safari Flicker Fix #2 */
	     -webkit-transform: translateZ(0);
}	
// Dropdown Menu Fade    
jQuery(document).ready(function(){
    $(".dropdown").hover(
        function() { $('.dropdown-menu', this).fadeIn("fast");
        },
        function() { $('.dropdown-menu', this).fadeOut("fast");
    });
});

External CSS

  1. https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/2.3.2/css/bootstrap.min.css

External JavaScript

  1. https://cdnjs.cloudflare.com/ajax/libs/jquery/2.1.3/jquery.min.js
  2. https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/2.3.2/js/bootstrap.min.js