<ul class="cp_tag01">
<li><a href="#">Dog</a></li>
<li><a href="#">Cat</a></li>
<li><a href="#">Rabbit</a></li>
</ul>

.cp_tag01 {
	list-style: none;
	margin: 0;
	overflow: hidden;
	padding: 0;

	position: absolute;
	top: 50%;
	left: 50%;
	-webkit-transform: translate(-50%,-50%);
					transform: translate(-50%,-50%);
}
.cp_tag01 li {
	display: inline-block;
}
.cp_tag01 a {
	line-height: 26px;
	position: relative;
	display: inline-block;
	height: 26px;
	margin: 0 10px 10px 0;
	padding: 0 20px 0 23px;
	-webkit-transition: color 0.2s;
	        transition: color 0.2s;
	text-decoration: none;
	color: #455a64;
	border-radius: 3px 0 0 3px;
	background: #cfd8dc;
}
.cp_tag01 a::before, .cp_tag01 a::after {
	background: #fafcfc;/*背景色*/
}
.cp_tag01 a::before {
	position: absolute;
	top: 10px;
	left: 10px;
	width: 6px;
	height: 6px;
	content: '';
	border-radius: 10px;
}
.cp_tag01 a::after {
	position: absolute;
	top: -2px;
	right: -6px;
	width: 0;
	height: 0;
	content: '';
	border-width: 15px 0 15px 8px;
	border-style: solid;
	border-color: transparent transparent transparent #cfd8dc;
	border-radius: 4px;
}
.cp_tag01 a:hover {
	color: #ffffff;
	background-color: #ec407a;
}
.cp_tag01 a:hover::after {
	border-left-color: #ec407a;
}