Can I hide only one category from admin post list?

Question

How can I hide all posts from a single category and not show them in the posts admin screen.

Answer 1

function posts_for_current_author($query) {
global $pagenow;

if( 'edit.php' != $pagenow || !$query->is_admin )
return $query;

else {
    $query->set('cat', "-11");
}
return $query;
}