WordPress hide certain plugins

gistfile1.php

//  thanks to Mike Little on WP-hackers

add_filter( 'all_plugins', 'dmc_remove_some_plugins' );
function dmc_remove_some_plugins( $all ) {
global $current_user;
$remove_these = array(
 'limit-login-attempts/limit-login-attempts.php',
'wordpress-firewall-2/wordpress-firewall-2.php',
 'update-notifier/update-notifier.php',
'wp-super-cache/wp-cache.php',
 'audit-trail/audit-trail.php',
);

    if ( isset( $current_user ) && ( 1 != $current_user->id ) ) {
        foreach( $all as $file => $data ) {
            if ( in_array( $file, $remove_these ) )
                unset( $all[$file] );
        }
    }
    return $all;
} // end dmc_remove_some_plugins