JSFiddle - React, Tailwind, and code Playground

HTML

<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.5/css/bootstrap.min.css">
<nav class="navbar navbar-default">
    <div class="container-fluid">
        <div class="navbar-header">
            <button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#navbar1" aria-expanded="false"> <span class="sr-only">Toggle navigation</span>
 <span class="icon-bar"></span>
 <span class="icon-bar"></span>
 <span class="icon-bar"></span>
            </button> <a class="navbar-brand" href="#">Responive Menu</a>

        </div>
        <div id="navbar1" class="navbar-collapse collapse">
            <ul class="nav navbar-nav">
                <li class="active"> <a href="#">Home</a>

                </li>
                <li class="dropdown"><a href="#" class="dropdown-toggle" data-toggle="dropdown">Hospital<b class="caret"></b></a>

                    <ul class="dropdown-menu">
                        <li class="dropdown dropdown-submenu"><a href="#" class="dropdown-toggle" data-toggle="dropdown">Consultants</a>

                            <ul class="dropdown-menu">
                                <li><a href="#">Adult cardiac surgery</a>

                                </li>
                                <li><a href="#">Bariatric surgery</a>

                                </li>
                                <li><a href="#">Colorectal surgery</a>

                                </li>
                                <li><a href="#">Endocrine and thyroid surgery</a>

                                </li>
                                <li><a href="#">Head and neck cancer surgery</a>

                                </li>
                                <li><a href="#">Interventional cardiology</a>

                                </li>
                                <li><a href="#">Lung Cancer</a>

                                </li>
                                <li><a href="#">Neurosurgery</a>

            ...

CSS

.dropdown-submenu {
    position:relative;
}
.dropdown-submenu>.dropdown-menu {
    top:0;
    left:100%;
    margin-top:-6px;
    margin-left:-1px;
    -webkit-border-radius:0 6px 6px 6px;
    -moz-border-radius:0 6px 6px 6px;
    border-radius:0 6px 6px 6px;
}
.dropdown-submenu>a:after {
    display:block;
    content:" ";
    float:right;
    width:0;
    height:0;
    border-color:transparent;
    border-style:solid;
    border-width:5px 0 5px 5px;
    border-left-color:#cccccc;
    margin-top:5px;
    margin-right:-10px;
}
.dropdown-submenu:hover>a:after {
    border-left-color:#555;
}
.dropdown-submenu.pull-left {
    float:none;
}
.dropdown-submenu.pull-left>.dropdown-menu {
    left:-100%;
    margin-left:10px;
    -webkit-border-radius:6px 0 6px 6px;
    -moz-border-radius:6px 0 6px 6px;
    border-radius:6px 0 6px 6px;
}

JavaScript

(function ($) {
    $(document).ready(function () {
        $('ul.dropdown-menu [data-toggle=dropdown]').on('click', function (event) {
            event.preventDefault();
            event.stopPropagation();
            $(this).parent().siblings().removeClass('open');
            $(this).parent().toggleClass('open');
        });
    });
})(jQuery);