To install the plugin just follow these simple steps:
- Download the plugin and expand it.
- Copy the 'order-categories.php' file into your plugins folder (wp-content/plugins/).
- Login into the WordPress administration area and go to the Plugins page.
- Locate the Order Categories plugin and click on the activate link
- That's it, now you can go to Manage > Order Categories and reorder the categories the way you want.
- If you use wp_list_categories(), make sure you don't specify an order (e.g. wp_list_categories('orderby=count');).