To change the categories tabs title according to your customization please do with following steps:
Step 1 Go to Add or Edit Map scroll down to ‘Tabs Settings’ section.
Step 2 Enable ‘Display Categories Tab’ from Display Tabs.
Step 3 Change the ‘Category Tab title’ as you want to dispaly.
Step 4 Save map and open it in browser.
Then you’ll see Map category title changed from the frontend.