getChildrenCategories在magento中不起作用，请在admin中按职位对类别进行排序

我不会像在管理中那样在前端对类别进行排序，如果我使用getChildren，那么它不会像在管理中那样对类别进行排序，但是如果我使用getChildrenCategories，那么不会有结果

  <?php

$cats = Mage::getModel('catalog/category')->load(74)->getChildren();

$catIds = explode(',',$cats);

$categories = array();
foreach($catIds as $catId) {
     $category = Mage::getModel('catalog/category')->load($catId);



    $categories[$category->getName()] = array(
        'url' => $category->getUrl(),
        'img' => $category->getImageUrl()
    );
}

ksort($categories, SORT_STRING);
?>
<ul>
    <?php foreach($categories as $name => $data): ?>
        <li>
            <a href="<?php echo $data['url']; ?>" title="<?php echo $name; ?>">
                <img class="cat-image" src="<?php echo $data['img']; ?>" />
            </a>
        </li>
    <?php endforeach; ?>
</ul>

使用有序的集合。请参见以下示例：

<?php
$category = Mage::getModel('catalog/category')->load(74);

$collection = $category->getCollection();
    ->addAttributeToSelect('name')
    ->addAttributeToSelect('image')
    ->addIdFilter($category->getChildren())
    ->setOrder('name', Varien_Db_Select::SQL_DESC);