There is one media query responsible for the behavior that I think you don't like.
It is in css the following media query:
@media (max-width: 767px) {
.navbar-nav .open .dropdown-menu {
background-color: transparent;
border: 0 none;
box-shadow: none;
float: none;
margin-top: 0;
position: static;
width: auto;
}
...
}
Just override the style like in the following css:
.navbar-nav .open .dropdown-menu {
background-color: #fff;
border: 1px solid rgba(0, 0, 0, 0.15);
border-radius: 4px;
box-shadow: 0 6px 12px rgba(0, 0, 0, 0.176);
}
You can find your updated Bootply here.
In the demo below I had to add !important
to the background color. Not sure why because at Bootply that isn't required.
.navbar-collapse.collapse {
display: block!important;
}
.navbar-nav>li, .navbar-nav {
float: left !important;
}
.navbar-nav.navbar-right:last-child {
margin-right: -15px !important;
}
.navbar-right {
float: right!important;
}
.navbar-nav .open .dropdown-menu {
background-color: #fff !important;
border: 1px solid rgba(0, 0, 0, 0.15);
border-radius: 4px;
box-shadow: 0 6px 12px rgba(0, 0, 0, 0.176);
position: static;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<script src="//maxcdn.bootstrapcdn.com/bootstrap/3.3.2/js/bootstrap.min.js"></script>
<link href="//maxcdn.bootstrapcdn.com/bootstrap/3.3.2/css/bootstrap.min.css" rel="stylesheet"/>
<nav class="navbar navbar-default" role="navigation">
<div class="container">
<ul class="nav navbar-nav navbar-left">
<li class="dropdown"><a href="#" data-tad="l1" class="nottodo dropdown-toggle" data-toggle="dropdown"><span class="fa fa-bell"></span> <span class="label label-success">0</span></a>
</li>
<li class="dropdown"><a href="#" class="dropdown-toggle" data-toggle="dropdown">Chat <span class="fa fa-comment"></span>
</a>
</li>
<li class="dropdown"><a href="#" data-tad="l1" class="nottodo dropdown-toggle" data-toggle="dropdown">Todo <span class="label label-info">0</span>
</a>
<ul class="dropdown-menu">
<li><a href="#"><span class="label label-warning">4:00 AM</span>Favourites Snippet</a></li>
<li><a href="#"><span class="label label-warning">4:30 AM</span>Email marketing</a></li>
<li><a href="#"><span class="label label-warning">5:00 AM</span>Subscriber focused email
design</a></li>
<li class="divider"></li>
<li><a href="#" class="text-center">View All</a></li>
</ul>
</li>
</ul>
<ul class="nav navbar-nav navbar-right">
<li class="dropdown"><a href="#" class="dropdown-toggle" data-toggle="dropdown"><span class="fa fa-user"></span> <b class="caret"></b></a>
<ul class="dropdown-menu">
<li><a href="#"><span class="glyphicon glyphicon-user"></span>Profile</a></li>
<li><a href="#"><span class="glyphicon glyphicon-cog"></span>Settings</a></li>
<li class="divider"></li>
<li><a href="#"><span class="glyphicon glyphicon-off"></span>Logout</a></li>
</ul>
</li>
</ul>
</div>
</nav>