ollapse {
        display: none!important;
    }
    .navbar-nav {
        float: none!important;
        margin-top: 7.5px;
    }
    .navbar-nav>li {
        float: none;
    }
    .navbar-nav>li>a {
        padding-top: 10px;
        padding-bottom: 10px;
    }
    .collapse.in{
        display:block !important;
    }
    }
</style>  
</head>
<body>
  <div class="navbar navbar-default">
  <div class="container-fluid">
 
        <button class="navbar-toggle" data-toggle="collapse" data-target="#menubar">
