the_category_rss filter-hook . WP 1.2.0

Filters all of the post categories for display in a feed.

Usage

add_filter( 'the_category_rss', 'filter_function_name_7764', 10, 2 );
function filter_function_name_7764( $the_list, $type ){
	// filter...

	return $the_list;
}

$the_list(string)

All of the RSS post categories.

$type(string)

Type of feed. Possible values include 'rss2', 'atom'.
Default: 'rss2'

Where the hook is called

return apply_filters( 'the_category_rss', $the_list, $type );

Where in WP core the hook is used WordPress