Get parent categories of custom post type

I'm trying to display all the categories that belong to the custom post type that the user is in.

For example this post: http://bit.ly/1ANisxN Is a custom post type that belongs to this page category: http://bit.ly/1FYscKh

As you can see the page category shows it's child categories which is exactly what I want to achieve it the custom post: http://ift.tt/1BzakEJ

This is the things I have tried in the custom post to show the parent categories with no luck:

<?php echo get_category_parents() ?>

By the way, this is how the category page is echoing its subcategories:

<?php  
$terms = get_terms( 'btp_work_category' ); 
   foreach ( $terms as $term ) {
       ?>
       <li><a href="#" data-filter=".filter-<?php echo $term->term_id; ?>"><?php echo $term->name; ?></a></li>
       <?php  
  }
?>      

Any idea on how to do this?

For example this category structure:

Electronics (Top category)

• 
  

  Cameras (sub category)

  
  
  
  
  • posts
  
  
  
  


• 
  

  TV (sub category)

  
  
  
  
  • posts
  
  
  
  


• 
  

  Cellphones (sub category)

  
  
  
  
  • posts
  
  
  
  

So If I'm on a cameras post I want to display the top category of it and its subcategories (which are relative to cameras since all are under `Electronics')