Get category list magento

anyfile.php

   <?php
   // Credit: http://excellencemagentoblog.com/blog/2011/09/14/magento-generate-category-tree-recursively/
                            $rootcatId= Mage::app()->getStore()->getRootCategoryId();
                            $categories = Mage::getModel('catalog/category')->getCategories($rootcatId);
                            function  get_categories($categories) {
                                $array= '<ul>';
                                foreach($categories as $category) {
                                    $cat = Mage::getModel('catalog/category')->load($category->getId());
                                    $count = $cat->getProductCount();
                                    $array .= '<li>'.
                                    '<a href="' . Mage::getUrl($cat->getUrlPath()). '">' .
                                              $category->getName() . "(".$count.")</a>\n";
                                    if($category->hasChildren()) {
                                        $children = Mage::getModel('catalog/category')->getCategories($category->getId());
                                         $array .=  get_categories($children);
                                        }
                                     $array .= '</li>';
                                }
                                return  $array . '</ul>';
                            }
                            echo  get_categories($categories); 
                        ?>