Now you know how to reorder blogs posts globally or reordering them with in a given category. This tutorial is also related to the given tutorials but here you will be knowing to to reorder post categories and custom taxonomies using the same drag and drop interface.
Here you will needing this plugin: Category Order and Taxonomy Terms Order. Install and activate it, upon activation you have to visit its options page and select your blog categories and other taxonomies where you want to use drag and drop reordering feature. After this you can start reordering your website category and custom taxonomy terms as shown in the given screenshot.