Edit theme login page
You may use hook_menu_alter function to do it

/**
 * Implements hook_menu_alter.
 */
 function MYMODULE_menu_alter(&amp;$items) {
   $items['user/login']['weight'] = 0;
   $items['user/password']['weight'] = 1;
   $items['user/register']['weight'] = 2;
 }