How to add custom class to anchor Tag of wordpress navigation menu?
I want to add a class to anchor Tag of wordpress navigation menu here is the code.

```
<ul class="nav">
 <li class="liTop"> <a class="nonblock nontext anim_swing clearfix" href="#home">Home</a> </li>
 <li class="liTop"> <a class="nonblock nontext anim_swing clearfix" href="#about">About</a> </li>
 <li class="liTop"> <a class="nonblock nontext anim_swing clearfix" href="#contact">Contact</a></li> 
</ul>

```