What should I do if the phpcms navigation drop-down does not display?

phpcms navigation drop-down is not displayed?

PHPCMS navigation only displays the first-level menu by default. How to display the second-level menu? Just need to make some simple modifications.

PHPCMS navigation modification, display drop-down menu

As shown in the figure, a second-level menu loop is added to the first-level menu.

{pc:content action="category" catid="$r['catid']" num="10" siteid="$siteid" order="listorder ASC"}
<ul class="navOpen">
    {loop $data $rr}
        <li><a href="{$rr[url]}">{$rr[catname]}</a></li>
    {/loop}
</ul>
{/pc}

You also need to set the columns that need to be displayed in the secondary menu to "display in navigation" in the background, otherwise they cannot be displayed

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