Thanks for your previous support.
Also I want to know How to disable edit option in Staffs. Only admin can add/edit. For Staffs, read only right is more.

To prevent non-administrators from adding/editing/deleting records, open web/staff/app/cls_ps_(--table-name--).inc.php and add

if ( !$this->sys->IsAdmin() ) exit;

after

case 'edit_inp':

The result should look like:

case 'edit_inp': if ( !$this->sys->IsAdmin() ) exit;

Do the same for the following lines, too.
case 'edit_done':
case 'reg_inp':
case 'reg_done':
case 'del_multi':