title: Wordpress change post title before publish
body: <p>I am using wordpress 3.5, I create a custom post type called order with title supports only.
  Now i want that when this order will publish the title text will be <code>order-#ID</code> , (here ID will be the post ID that going to be publish) nothing else if user write something in title it will not publish it just save with value like <code>order-#23</code> . </p>
  
  <p>Another thing is any other way to hide title input (i don't wanna show title and editor) but save its value when it publish as like <code>order-#265</code>.</p>