Can you take a look at the code below and help me identify what's wrong? I'm trying to organize Add Result and Manage Result under Result. Additionally, Add1 Result and Add2 Result should be nested under Add Result, creating a hierarchy. However, my current code doesn't seem to be working as expected. Any suggestions?
<li class="has-children">
<a href="#"> <span>Result</span> </a>
<ul class="child-nav">
<li class="has-children">
<a href="add-result.php"><span>Add Result</span></a>
<ul class="child-nav">
<li>
<a href="add1-results.php"> <span>Add1 Result</span></a>
</li>
<li>
<a href="add2-results.php"> <span>Add2 Result</span></a>
</li>
</ul>
</li>
<li>
<a href="manage-results.php"> <span>Manage Result</span></a>
</li>
</ul>
</li>