Add all shop categories classes to body

Hope someone can help here.

I found this code on here already:

/**
 * Custom class for the 'body_class()' function
 * Add product category only on single view
 */
function isa_body_classes($classes) {
     // only add body class when viewing single product
    if(wpsc_is_single_product()) {
        //get cat of product
            function isa_get_cat() {
global $wp_query, $wpsc_query;
$query_data = Array();
$isa_post_id = wpsc_the_product_id();
$categories = wp_get_object_terms( $isa_post_id , 'wpsc_product_category' );
//if product is associated w more than one category
if(count($categories) > 1 && isset($wpsc_query->query_vars['wpsc_product_category']))
    $query_data['category'] = $wpsc_query->query_vars['wpsc_product_category'];
elseif(count($categories) > 0)
    $query_data['category'] = $categories[0]->slug;
return $query_data['category'];
}
//ends get cat, now echo the cat as class below
$classes[] = isa_get_cat();
};
return array_unique($classes);
};
add_filter('body_class','isa_body_classes');

It does want I wanted at the time, however, I now wish to add all shop categories to the body class. The above code pulled out one, for example ‘cushions’, I have say one product in a category called ‘cushion’, ‘collection1’.

I’m using GetShopped, does anyone know the answer?

Regards.

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