disable theme changing

Remove the 'Appearance' menu option from the dashboard.

add_action( \'admin_init\', \'slt_lock_theme\' );
function slt_lock_theme() {
    global $submenu, $userdata;
    get_currentuserinfo();
    if ( $userdata->ID != 1 ) {
        unset( $submenu[\'themes.php\'][5] );
        unset( $submenu[\'themes.php\'][15] );
    }
}