1. Install Justin Tadlock’s Members plugin
2. After activation go to User > Roles and edit the Administrator role and add a new capability called ‘access_admin’ for example
3. Add the following code to your theme’s functions.php:
function restrict_admin(){ //if not administrator, kill WordPress execution and provide a message if ( ! current_user_can( 'access_admin' ) ) { wp_die( __('You are not allowed to access this part of the site') ); } } add_action( 'admin_init', 'restrict_admin', 1 );
And you’re done! Only users with the ‘Administrator’ role or the ‘access_admin’ capability will be able to access wp-admin.