list the posts category …

maybe this: http://codex.wordpress.org/Function_Reference/get_the_category#Show_the_First_Category_Name_Only

To show it as a link use this:

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

Read my post above your last one.

You’re welcome. Glad you got it resolved.