php - Wordpress nav walker to count sub-menus -


in wordpress menu, need add class parent <li> when has 3 levels (when parent's sub-menu has sub-menu). in other words:

<ul>     <li>parent         <ul class="sub-menu">             <li>sublink1</li>             <li>sublink2</li>         </ul>     </li>     <li>parent</li>     <li class="mega">parent <!-- add class here b/c has 3 levels -->         <ul class="sub-menu">             <li>sublink1</li>             <li>sublink2</li>             <li>sublink3                 <ul class="sub-menu">                     <li>sublink1</li>                     <li>sublink2</li>                 </ul>             </li>         </ul>     </li>     <li>parent</li>     <li>parent</li>     <li>parent         <ul class="sub-menu">             <li>sublink1</li>             <li>sublink2</li>         </ul>     </li> </ul>

i'm sure need use walker achieve this, haven't been able find example of 1 this. thank you!


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