To display certain posts on your WordPress website you may need to hide specific categories from posts pages.
To hide the specifics category, you need to add the following lines above the Loop
<?php if (is_front_page() && !is_paged()
) $posts = query_posts($query_string . ‘&cat=-35,-68’); ?>
This prevents posts from categories 35 and 68 are not appearing in the list of posts.