content_categories
content_categories — returns array categories for given content id
Summary
content_categories($content_id);Return Values
Array with the content categories or false if the content is not found
Usage
$categories = content_categories($content_id); 
if(!empty($categories)){
    foreach($categories as $category){
        print $category['id'];
        print $category['title'];
        // and more... print_r($category);
    }
}