make submenu in navbar bootstrap code example

Example: simple html multilevel dropdown menu for navbar

<ul id="menu">
	<li class="parent"><a href="#">Popular Toys</a>
	<ul class="child">
		<li class="parent"><a href="#">Video Games <span class="expand">»</span></a>
			<ul class="child">
			<li><a href="#">Car</a></li>
			<li><a href="#">Bike Race</a></li>
			<li><a href="#">Fishing</a></li>
			</ul>
		</li>
		<li><a href="#">Barbies</a></li>
		<li><a href="#">Teddy Bear</a></li>
		<li><a href="#">Golf Set</a></li>
	</ul>
	</li>
	<li class="parent"><a href="#">Recent Toys</a>
	<ul class="child">			
		<li><a href="#">Yoyo</a></li>
		<li><a href="#">Doctor Kit</a></li>
		<li class="parent"><a href="#">Fun Puzzle<span class="expand">»</span></a>
			<ul class="child">
			<li><a href="#" nowrap>Cards</a></li>
			<li><a href="#" nowrap>Numbers</a></li>
			</ul>
		</li>
		<li><a href="#">Uno Cards</a></li>
	</ul>
	</li>
	<li class="parent"><a href="#">Toys Category</a>
	<ul class="child">			
		<li><a href="#">Battery Toys</a></li>
		<li class="parent"><a href="#">Remote Toys <span class="expand">»</span></a>
			<ul class="child">
			<li><a href="#">Cars</a></li>
			<li><a href="#">Aeroplane</a></li>
			<li><a href="#">Helicopter</a></li>
			</ul>
		</li>
		<li><a href="#">Soft Toys</a>
		</li>
		<li><a href="#">Magnet Toys</a></li>
	</ul>
	</li>
</ul>