How to replace hover in in on click

by Zia Ullah

HTML

<nav>
	<ul>
		<li><a href="#">Home</a></li>
		<li><a href="#">Tutorials</a>
			<ul>
				<li><a href="#">Photoshop</a></li>
				<li><a href="#">Illustrator</a></li>
				<li><a href="#">Web Design</a>
					<ul>
						<li><a href="#">HTML</a></li>
						<li><a href="#">CSS</a></li>
					</ul>
				</li>
			</ul>
		</li>
		<li><a href="#">Articles</a>
			<ul>
				<li><a href="#">Web Design</a></li>
				<li><a href="#">User Experience</a></li>
			</ul>
		</li>
		<li><a href="#">Inspiration</a></li>
	</ul>
</nav>

CSS

nav {
  text-align:center;
  width: 100%;
  background: #bebebe;
  padding: 0;
  margin: 0;
  height: 60px;
  position:relative;
}
nav ul {
  background: #bebebe;
  list-style:none;
  padding:0 20px;
  margin: 0;
  height: 60px;
}
nav ul li {
  display: inline-block;
}
nav ul li a {
  color:#333333;
  display:block;
  padding:0px 40px;
  text-decoration:none;
  float: left;
  height: 60px;
   line-height: 60px;
}
nav ul li:hover {
  background: #333333;
}
nav ul li:hover > a{
    color:#FFFFFF;
}
nav ul li:hover > ul {
  display:block;
}
nav ul ul {
  background: #BEBEBE;
  padding:0;
  text-align: center;
  display:none;
    width: 100%;
  position: absolute;
  top: 60px;
  left: 0px;
}