gistfile1.txt

global $wpdb;

			//old name
			$table_booking_logs_old       = $wpdb->prefix . 'rbookinglogs';
			$table_branch_manager_old     = $wpdb->prefix . 'branch_manager';


			//new name
			$table_booking_logs       = $wpdb->prefix . 'cbxrbooking_log_manager';
			$table_branch_manager     = $wpdb->prefix . 'cbxrbooking_branch_manager';



			//start name process
			//rename log table
			if($wpdb->get_var("SHOW TABLES LIKE '$table_booking_logs_old'") === $table_booking_logs_old) {
				//Your code here
				$wpdb->query("RENAME TABLE $table_booking_logs_old TO $table_booking_logs");
			}

			//rename branch manager table
			if($wpdb->get_var("SHOW TABLES LIKE '$table_branch_manager_old'") === $table_branch_manager_old) {
				//Your code here
				$wpdb->query("RENAME TABLE $table_branch_manager_old TO $table_branch_manager");
			}
			//end rename process