On your client's website there's an Activities category. Your client wants to make it clear that this site section is not about the activities organized by other art societies—it's only about CORBA. Could you please change the name of the section to CORBA Activities?
Navigate to Content | Category Manager and click on the title of the Activities section to open it for editing.
In the edit screen, change the title to
CORBA Activities
.In the Alias field, remove the existing alias (remember, the alias is Joomla's internal name for the article used when creating user-friendly URLs). Leave this box blank; Joomla will fill it with CORBA-activities when you apply or save your changes. You can check that now by clicking on Save. You'll notice the Alias box is filled out automatically.
Click on Close. In the Category Manager, the new title and alias are displayed.