Course Category 
Go to Admin->Course Category
The Course Category Management feature provides to manage Course Category. Administrators can:
Course Category list 

Create new course category 
Step 01: Click on Add New button 

Step 02: Fill the information and click the Save button 

Edit 
Step 01: Click on edit button 

Delete 
Step 01: Click the delete button 

Don't worry we just move the data into trash and you can restore easily from trash tab. 
Trash 
Click on trash button to see trashed course categorys. 

Restore 
Click on the restore button to restore and republish the deleted course category. 

Permanent Delete 
Step 01: Click on the delete button 
