Step (1) − Click on Posts → Category Order in WordPress. The Category Order menu displays after adding the Category Order plugin. You can study how to install plugins in the chapter Install Plugins.
Step (2) − In the following screen, you can see that the creation categories section is not in order.
Step (3) − Now, you can rearrange your categories by just dragging the categories as per your choice. Click on the Order categories button to save the ordered categories.