Hide specific category from get_the_category

Ok i have homepage with 3 areas that i need to fill with my existing posts:

• Main Featured area (1 post)
• Featured area (3 posts)
• Editors Picks (5 posts)

Besides this 3 categories i have around 15 more and my site is blog based so i use archive pages a lot to list those posts.

What was i doing before in situations like this is i would just create 3 more categories with names of my ares, and when i want to put some post in Featured area i just add it in that category and query it on my homepage.

My problem now is that on single.php page i need to print category of posts and there should not be any of those 3 that i use for homepage.

For example my posts is in Category “Boy Talks” and i want to put it in my Featured Posts area, so in my single post page i will get “Boy Talks Featured Posts”, but i need only “Boy Talks” there. I tried with this

<?php
$category = get_the_category();
if ($category[0]) {
 echo '<a href="' . get_category_link($category[0]->term_id) . '"><h3>' . $category[0]->cat_name . '</h3></a>';
 }
 ?>

And it gives me just first one in this case “Boy Talks” but problem is when my category is Weekend than word stars on W and it is behind Featured Posts so this code on top gives me “Featured Posts”.

So my problem is how to hide those 3 from printing when i want to see cat of post?

Or if you have another approach to show some of my existing posts and put them in those 3 areas on homepage please say.

Thanks

Alex