Edit in JSFiddle

nav {
	width: 960px;
	height: 100px;
	margin: 120px auto;
	text-align: center;
}
.top-menu li {
	display: inline-block;
	text-align: center;
	margin: 30px 5px;
	position: relative;
	-webkit-transition: all 0.3s ease; 
	-moz-transition: all 0.3s ease;
	-o-transition: all 0.3s ease;
}
.top-menu li:hover {
	margin: 30px 20px; 
}
.top-menu li:active {
	margin: 30px 33px; 
}
.top-menu li a  {
	width: 100px;
	height: 100px;
	z-index: 9999;
	position: absolute;
	top: 35px;
	font-weight: bold;
	display: block;
	text-decoration: none;
	font-size: 20px;
	color: #fff;
	text-shadow: 0px 1px 1px rgba(0,0,0,0.4), 0px 4px 6px rgba(0,0,0,0.1), 0px 9px 11px rgba(0,0,0,0.1);
	-webkit-transition: all 0.1s linear; 
	-moz-transition: all 0.1s linear;
	-o-transition: all 0.1s linear;
}
.top-menu li:active a {
	font-size: 26px;
	top: 30px;
	text-shadow: none;
}
.top-menu li div.menu-item {	
	width: 100px;
	height: 100px;
	display: block;
	-webkit-transition: all 0.2s ease; 
	-moz-transition: all 0.2s ease;
	-o-transition: all 0.2s ease;
	-webkit-border-top-left-radius: 100px; 
	-webkit-border-bottom-right-radius: 100px; 
	-moz-border-radius-topleft: 100px; 
	-moz-border-radius-bottomright: 100px; 
	border-top-left-radius: 100px; 
	border-bottom-right-radius: 100px;
	-webkit-transform: rotate(45deg);
	-moz-transform: rotate(45deg);
	-o-transform: rotate(45deg);
}
.top-menu li:hover div.menu-item{ 
	-webkit-border-top-left-radius: 80px; 
	-webkit-border-bottom-right-radius: 80px; 
	-moz-border-radius-topleft: 80px; 
	-moz-border-radius-bottomright: 80px; 
	border-top-left-radius: 80px; 
	border-bottom-right-radius: 80px; 
		-webkit-transform: rotate(225deg);
	-moz-transform: rotate(225deg);
	-o-transform: rotate(225deg);
}
.top-menu li:active div.menu-item{ 
	-webkit-border-top-left-radius: 50px; 
	-webkit-border-bottom-right-radius: 50px; 
	-moz-border-radius-topleft: 50px; 
	-moz-border-radius-bottomright: 50px; 
	border-top-left-radius: 50px; 
	border-bottom-right-radius: 50px; 

}
#home { background: #41D05F; }
#cataloge { background: #FE80B9; }
#price { background: #FFFF00; }
#about { background: #a800ff; }
#contact { background: #49a7f3; }
<nav>
  <ul class="top-menu">
    <li><a href=#>Home</a><div class="menu-item" id="home"></div></li>
    <li><a href=#>Sitemap</a><div class="menu-item" id="cataloge"></div></li>
    <li><a href=#>Tools</a><div class="menu-item" id="price"></div></li>
    <li><a href=#>About</a><div class="menu-item" id="about"></div></li>
    <li><a href=#>Contact Us</a><div class="menu-item" id="contact"></div></li>
  </ul>
</nav>