Currently in a Category view page, its sub categories are displayed in a list format. I would like to change the list to select option so when there are too many sub categories users does not have to scroll all the way to the bottom to view the content. 

**Current Code:**

```
<ul>
<?php foreach ($this->getCurrentCategory()->getChildrenCategories() as $_subcat): ?>
    <li><a href="<?php echo $_subcat->getUrl() ?>"><?php echo Mage::helper('catalog/output')->categoryAttribute($_subcat, $_subcat->getName(), 'name') ?></a></li>
<?php endforeach ?>
</ul>

```

How can I accomplish this so the sub-categories is displayed in a select option?