Edit in JSFiddle

<a class="link" href="http://www.moshikub.com">โมชิ</a>
<style>
	.link { 
		color:#999;
	}
	.link:before { 
		content: 'สวัสดี';
		color:#000;
	}
	.link:after { 
		content: 'ครับ';
		color:#555;
	}
</style>