I am trying to do this in my override tpl.categories.php:

// to make a specific category stand out define a new class in the stylesheet example: A.category-holiday
// uncomment the select below and set the cPath=3 to the cPath= your_categories_id
// many variations of this can be done
// case ($box_categories_array[$i]['path'] == 'cPath=3'):
// $new_style = 'category-holiday';
// break;

but I am not doing it right, could someone please walk me throught it:

I created a class in the stylesheet:
a.category-accessories {font-weight=bold;}

for the category accessories.

I changed the above to;

case ($box_categories_array[$i]['path'] == 'cPath= accessories'):
$new_style = 'category-accessories';
break;

but it doesn't work. What am I doing wrong?