我创建了一个代码来显示记录中项目的类别。
如果第1项是电话，则代码显示电话。但问题是，当同一类别有两个以上的代码时，代码会显示同一类别的两倍或两倍以上
https://i.imgur.com/zq5oahq.png
我的密码是

$select_parent = "SELECT ads_id, ads_title, category_id FROM public_ads WHERE ads_active = 1 AND ads_genre = 'Loja' AND ads_end = 0";
$parent_query = $con->query($select_parent);

if($parent_query->num_rows > 0) {

    while($parents = $parent_query->fetch_assoc()) {

        $select_categories = "SELECT category_id, category_title FROM public_categories WHERE category_id = '".$parents['category_id']."' ORDER BY category_id Limit 1";
        $category_query = $con->query($select_categories);            

        while($options = $category_query->fetch_assoc()) {

           echo '<li><a href="store?p='. $parents['category_id'] .'&article='. $options['category_title'] .'"><i class="fas fa-angle-right"></i> '. $options['category_title'] .'</a></li>';
        }

   }                                
}