Addinga new category in WordPress is easy, but changing the “default” category and removing the ”Uncategorized” category can be a pain if you don’t know how to do it. Well, here is how you do it:
1 – Decide which category you wish to designate as the new “default” category. If the “Uncategorized” category is the only category you have, you’ll have to add at least one new category before proceeding on to the next step.
2 – Choose the “Writing” option on the “Settings” menu.
3 – In the drop-down box labeled “Default Post Category”, select the category that you wish to use as the new default category.
4 – Click “Save Changes” at the bottom of the page.
Now that you have selected a new “default” category, you can completely remove the “Uncategorized” category as follows:
1 – Under the “Posts” menu, click “Categories”.
2 – In the list of categories on the right-hand side of the screen, check the box beside “Uncategorized”.
3 – In the “Bulk Actions” drop-down box, click “Delete”, then click “Apply”.
Note: When you delete the “Uncategorized” category, all posts currently filed under that category will be moved automatically into the new default category.