Разбивка страниц по категориям (родителям)

<div id="pdopage">
    <div class="rows">
    [[!pdoPage?
        &parents=`0`
        &level=`0`
        &limit=`6`
        &where=`{"modResource.parent:!=":0}`
        &sortby=`{"p_menuindex":"ASC", "publishedon":"DESC"}`
        &ajaxMode=`default`
        &leftJoin=`{
            "Parent":{"class":"modResource", "on":"Parent.id = modResource.parent"}
        }`
        &select=`{
            "modResource":"*",
            "Parent":"Parent.id as pid, Parent.pagetitle as parent_pagetitle, Parent.uri as p_uri, Parent.menuindex as p_menuindex"
        }`
        &tpl=`@INLINE <h3 class="parent-title parent-{$pid}" data-pid="{$pid}">{$parent_pagetitle}</h3>
        <p>{$pagetitle}</p>`
    ]]
    </div>
    [[!+page.nav]]
</div>
<script>
    function hideTitles() {
        $('.parent-title').hide();
        $('.parent-title').each(function(){
            $('.parent-' + $(this).data('pid')).first().show();
        });
    }
    hideTitles()
    $(document).on('pdopage_load', function(e, config, response) {
        hideTitles()
    });
</script>

Взято тут: https://ilyaut.ru/cheats/a-breakdown-of-the-categories-parents/