Export all Magento Categories with Name, ID

catexport.php

<?php
require_once 'app/Mage.php';
Mage::app();

$_categories = Mage::getModel('catalog/category')
                    ->getCollection()
                    ->addAttributeToSelect('*');

$_file = __DIR__."/categories.csv";
$_export = fopen($_file, 'w') or die('Permission denied - check filesettings');

$_output = "";
$_output = "\"Name\", \"ID\"\r\n";
fwrite($_export, $_output);

foreach($_categories as $_category)
{
  $_output = "";
  $_output .= '"'.$_category->getName().'", ';
  $_output .= $_category->getId();

  $_output .= "\r\n";
  fwrite($_export, $_output);
}

fclose($_export);