Exclude Category .. Sometime we don’t want to show the posts from the particular category so here is the code you have to modify..
query_posts(array(
'post_type' => 'post',
'showposts' => 14,
'category__not_in' => 10, // category id
) );
In the above code you can find ID of that category in dashboard and can apply here..in place of 10 highlighted.
If you want to leave posts from more than 1 category then you can apply this code there..
query_posts(array(
'post_type' => 'post',
'showposts' => 14,
'category__not_in' => array(6,10), // category id's
) );
For any help contact me here..