Webform simplenews component styling
You can make use of the arrange fields module. 


  This module lets you drag-and-drop the fields of any CCK content type,
  Webform, or almost any other form in Drupal into the positions you
  would like for editing. This makes it super simple to have forms with
  inline fields, which you can change at any point. Tab indexing is also
  updated, so no matter how you arrange the fields, the users can still
  tab through them easily. And, you can now add arbitrary bits of HTML
  markup-- labels, images, HR's, etc.