Php Sub Category loop html - php

Question

I get the data from the database. but I can not write between li,ul html tags.There is a problem in the loop. How do I write between li ul categories and subcategories. I have this pdo mysql category function.
<?php
...
function kategoriVer($ustid=0){
$result = DB::get('SELECT * FROM urunler_kategori WHERE kategori_k='.$ustid.'');
echo '<ul class="drop-down">';
foreach($result as $kategori){
echo '<li class="drop">
'.$kategori->baslik_k.'';
kategoriVer($kategori->id_k);
}
echo '</li></ul>';
}
kategoriVer();
?>
output html:
<ul class="sub-menu">
<li class="menuparent">
Çadırlar
<ul class="sub-menu">
<li class="menuparent">Hi-Tech Çadırlar<ul class="sub-menu"></li></ul>
<li class="menuparent">Çelik Konstrüksiyon<ul class="sub-menu"></li></ul>
<li class="menuparent">Tribün Çadırlar<ul class="sub-menu"></li></ul>
<li class="menuparent">Yürüyüş Yolları<ul class="sub-menu"></li></ul>
</li>
</ul>
<li class="menuparent">Şemsiyeler<ul class="sub-menu"></li></ul>
<li class="menuparent">İklimlendirme<ul class="sub-menu"></li></ul>
</li>
</ul>
i want this output:
<ul class="sub-menu">
<li class="menuparent">
Headers
<ul class="sub-menu">
<li>Standard</li>
<li>No Topbar</li>
<li>Social Icons</li>
<li>Minimal</li>
<li>Classic</li>
</ul>
</li>
</ul>