Magento : Get parent category and sub category (Id,Name)

<?php

$_helper = Mage::helper('catalog/category')
$_categories = $_helper->getStoreCategories()
$currentCategory = Mage::registry('current_category')
if (count($_categories) > 0):
 
        foreach($_categories as $_category):

echo $_category->getId();
echo $_category->getName();
           
        $_category = Mage::getModel('catalog/category')->load($_category->getId())
                $_subcategories = $_category->getChildrenCategories()
                if (count($_subcategories) > 0):
               
                foreach($_subcategories as $_subcategory):
                 
echo $_subcategory->getId();
echo $_subcategory->getName();
                               
foreach (Mage::getModel('catalog/category')->load(  $_subcategory->getId())->getChildrenCategories() as $childCategory)

        {
echo $childCategory->getId();
echo $childCategory->getName();    
        }
                           
                        endforeach;
                 
     endif;

        endforeach;

endif; ?>