How to Change the Name of a Category on WordPress
Upon installation, WordPress gives you one default category to get you started called Uncategorized. That category name is pretty generic, so you’ll definitely want to change it to one that’s more specific to you.
The default category also serves as a kind of fail-safe. If you publish a post to your blog and don’t assign that post to a category, the post is automatically assigned to the default category, no matter what you name the category.
So how do you change the name of that default category? When you’re logged in to your WordPress Dashboard, just follow these steps:
Click the Categories link on the Posts Dashboard menu.
The Categories page opens, containing all the tools you need to set up and edit category titles for your blog.
Click the title of the category you would like to edit.
To change the Uncategorized category, click the word Uncategorized, and you go to the Edit Category page.
Type the new name for the category in the Name text box. Type the new slug in the Slug text box, as well.
The term slug refers to the word(s) used in the web address for the specific category. For example, the Books category has a web address of http://yourdomain.com/category/books; if you change the slug to Books I Like, the web address is http://yourdomain.com/category/books-i-like. (WordPress automatically inserts a dash between the slug words in the web address.)
Choose a parent category from the Parent drop-down menu.
If you want this category to be a main category, not a subcategory, choose None.
You can type a description of the category in the Description text box if you choose to remind yourself what your category is about. Some WordPress themes display the category description right on your site, too, which can be helpful for your visitors. You’ll know if your theme is coded in this way if your site displays the category description on the category page(s).
Click the Update button.
The information you just edited is saved, and the Categories page reloads, showing your new category name.
If you want to edit a category’s name only, you can click the Quick Edit link underneath the name on the Category page, which you see when you hover your mouse over the Category name. Then you can do a quick name edit without having to load the Edit Category page.