Show subcategories on category page

<?php

$_helpernew = Mage::helper('catalog/category');

 $_subcategories = $_category->getChildrenCategories();?>

                <?php if (count($_subcategories) > 0): ?>

                    <ul>

                        <?php foreach($_subcategories as $_subcategory): ?>

                            <li>

                                <a href="<?php echo $_helpernew->getCategoryUrl($_subcategory) ?>">

                                    <?php echo $_subcategory->getName() ?>

                                </a>

                            </li>

                        <?php endforeach; ?>

                    </ul>

                <?php

                                                               

endif;

                                                               

?>