Create Custom Category Block in Magento

<?php
	$cats = Mage::getModel('catalog/category')->load(2)->getChildren();
	$catIds = explode(',',$cats);
?>
<ul>
<?php foreach($catIds as $catId): ?>
	<li>
		<?php
		$category = Mage::getModel('catalog/category')->load($catId);
			echo $category->getName();
			$subCats = Mage::getModel('catalog/category')->load($category->getId())->getChildren();
			$subCatIds = explode(',',$subCats);
		?>
		<?php if(count($subCatIds) > 1):?>
		<ul>
			<?php foreach($subCatIds as $subCat) :? >
			<li>
				<?php
					$subCategory = Mage::getModel('catalog/category')->load($subCat);
					echo $subCategory->getName();
				?>
			</li>
			<?php endforeach;?>
		</ul>
		<?php endif; ?>
	</li>
<?php endforeach; ?>
</ul>