Magento - 在下拉列表中显示所有类别

I am creating a simple script for updating all prices to all products within a specific category in Magento. I have the action code working and it updates the prices. Now I am making a form that has a dropdown with all the available categories in it then a text field that a percent is inputted. The problem I am having is I can not get the dropdown to populate the categories and I am going insane. I have tried other similar code and hacked to pieces other code to try to get it to work and it is driving me insane. Below is my current hacked up version - I know it is ugly and wrong but eh what can you do. Thanks for looking.

    <?php
require 'app/Mage.php';
Mage::app();
class Mymodule_Pup_Helper_Data extends Mage_Core_Helper_Abstract {
public function getCategoriesDropdown() {
$categoriesArray = Mage::getModel(‘catalog/category’)
->getCollection()
->addAttributeToSelect(‘name’)
->addAttributeToSort(‘path’, ‘asc’)
->addFieldToFilter(‘is_active’, array(‘eq’=>’1′))
->load()
->toArray();
foreach ($categoriesArray as $categoryId => $category) {
if (isset($category['name'])) {
$categories[] = array(
‘label’ => $category['name'],
‘level’  =>$category['level'],
‘value’ => $categoryId
);
}
}
return $categories;
}
}
?>
<html>
<body>
Update Prices by Category
<form action="pupped.php" method="post">
<select id="category-changer" name="cat" style="width:150px;">
<option value="">--Select Category--</option>
<?php
$_CategoryHelper = Mage::helper("pup")->getCategoriesDropdown();
foreach($_CategoryHelper as $value){
foreach($value as $key => $val){
if($key=='label'){
$catNameIs = $val;
}
if($key=='value'){
$catIdIs = $val;
}
if($key=='level'){
$catLevelIs = $val;
$b ='';
for($i=1;$i<$catLevelIs;$i++){
$b = $b."-";
}
}
}
?>
<option value="<?php echo $catIdIs; ?>"><?php echo $b.$catNameIs ?></option>
<?php
}
?>
</select>
Percent: <input type="text" name="per">
<input type="Submit">
</form>
</body>
</html>

below are the code get subcategory in drop down

<select id="category" class="myinput-text required-entry widthinput" name="category">
<?php
  $parentid=5; // parent id which you want sub category
  $categories=explode(',',Mage::getModel('catalog/category')->load($parentid)->getChildren());
  foreach($categories as $cat){ 
     $category=Mage::getModel('catalog/category')->load($cat);
?>
   <option value="<?php echo $category->getId();?>"><?php echo $category->getName();?></option>
<?php } ?>
</select>
You can use the following code to easily display all categories in the dropdown till level 3:

                <div align="right" class"all_categories_list" style="display:inline-block;width:50%;">      
                    <form>
                        <select class="select" id="option" name="option" onChange="window.document.location.href=this.options[this.selectedIndex].value;" value="GO" style="width: 25%;">
                             <option value="*">All Categories</option>
                                    <?php $_helper = Mage::helper('catalog/category') ?>
                                    <?php $_categories = $_helper->getStoreCategories() ?>
                                    <?php $currentCategory = Mage::registry('current_category') ?>
                                    <?php if (count($_categories) > 0): ?><!-----------Level 1 ----->
                                    <?php foreach($_categories as $_category): ?>
                             <option value="<?php echo $_helper->getCategoryUrl($_category) ?>"><?php echo $_category->getName() ?></option> 
                                    <?php $_category = Mage::getModel('catalog/category')->load($_category->getId()) ?>  
                                    <?php $_subcategories = $_category->getChildrenCategories()?>
                                    <?php if (count($_subcategories) > 0):?><!-----------Level 2 ----->
                                    <?php foreach($_subcategories as $_subcategory):?>
                            <option value="<?php echo $_helper->getCategoryUrl($_subcategory)?>"><?php echo $_subcategory->getName() ?></option>  
                                    <?php $_subcategory = Mage::getModel('catalog/category')->load($_subcategory->getId()) ?>    
                                    <?php $_subcategoriesss = $_subcategory->getChildrenCategories()?>
                                    <?php if (count($_subcategoriesss) > 0):?><!-----------Level 3 ----->
                                    <?php foreach($_subcategoriesss as $_subcategoryy):?>
                            <option value="<?php echo $_helper->getCategoryUrl($_subcategoryy)?>"><?php echo $_subcategoryy->getName() ?></option>  
                                    <?php endforeach; ?>
                                    <?php endif; ?>
                                    <?php endforeach; ?>
                                    <?php endif; ?>
                                    <?php endforeach; ?>
                                    <?php endif; ?>
                        </select>
                    </form>
                </div>
<!------------------------All categories and Subcategories level 3 in dropdown ---------------------------->