$post_categories = get_categories(array(
'orderby' => 'id',
'order’ => 'DESC',
'number' => 6,
'hide_empty' => 0,
//'exclude' =>array(1)
) );
foreach( $post_categories as $category ) {
//Get category image by custom fields
$image = get_field( 'featured_image', $category->taxonomy . '_' . $category->term_id);
echo 'Category image = '.$image;
echo 'Category link = '.get_category_link($category->term_id);
echo 'Category name = '.$category->name;
echo 'Category description = '.$category->description;
}