Try something like this :
$value = get_field('field_name');
Try whole process based on this http://www.advancedcustomfields.com/resources/how-to/filter-posts-by-custom-fields/
$value = get_field('field_name', $category->cat_ID);
Try something like this :
$value = get_field('field_name');
Try whole process based on this http://www.advancedcustomfields.com/resources/how-to/filter-posts-by-custom-fields/
$value = get_field('field_name', $category->cat_ID);