Hello,
To rename table name from phpMyadmin is very simple. Below are the steps.
1. Login to cPanel
2. Go to phpMyadmin.
3. Click on the database from list of databases on the phpMyAdmin home screen.
4. Select table by click on it. Inside the table screen, click on the Operations tab.
5. Find for Rename table to option, their enter the new name of the table.
6. Click on Go.
Enjoy!!