inclue link list category as css class - php

Question

I'd like to render some extra css classes in my wordpress links list, specifically id like to render the link category as a css class, so for example:
link : http://www.foobar.com/
gategories : friends, colleagues
name : Foo Bar
Currentyly renders as:
Foo Bar
But I want it to render as:
Foo Bar
I know that you use the following function to build the links list but i cant work out how to modify it to do what I need:
function wp_list_bookmarks($args = '') {
$defaults = array(
'orderby' => 'name', 'order' => 'ASC',
'limit' => -1, 'category' => '', 'exclude_category' => '',
'category_name' => '', 'hide_invisible' => 1,
'show_updated' => 0, 'echo' => 1,
'categorize' => 1, 'title_li' => __('Bookmarks'),
'title_before' => '<h2>', 'title_after' => '</h2>',
'category_orderby' => 'name', 'category_order' => 'ASC',
'class' => 'linkcat', 'category_before' => '<li id="%id" class="%class">',
'category_after' => '</li>'
);
$r = wp_parse_args( $args, $defaults );
extract( $r, EXTR_SKIP );
$output = '';
if(1) {
//output one single list using title_li for the title
$bookmarks = get_bookmarks($r);
if ( !empty($bookmarks) ) {
if ( !empty( $title_li ) ){
$output .= str_replace(array('%id', '%class'), array("linkcat-$category", $class), $category_before);
$output .= "$title_before$title_li$title_after\n\t<ul class=\"xoxo blogroll $category\">\n";
$output .= _walk_bookmarks($bookmarks, $r);
$output .= "\n\t</ul>\n$category_after\n";
} else {
$output .= _walk_bookmarks($bookmarks, $r);
}
}
}
$output = apply_filters( 'wp_list_bookmarks', $output );
if ( !$echo )
return $output;
echo $output;
}
?>
Thanks!

Answer 1

Firstly, you should never modify the Wordpress Core functions. In the case of Bookmarks, however, I don't really blame you for wanting to. They're kind of a pain.
I would just build it from scratch using get_bookmarks(). Here's a working example:
foreach(get_bookmarks() as $bm)
{
$terms = get_the_terms($bm->link_id, 'link_category');
$classes = array('wp_link');
if($terms)
foreach($terms as $term)
$classes[] = $term->slug;
echo '<a class="'.implode(' ', $classes).'" href="'.$bm->link_url.'"'.($bm->link_target ? 'target="'.$bm->link_target.'"' : '').'>'.$bm->link_name.'</a><br/>';
}
Just place this wherever it is in your template that you want to generate your bookmarks. Or you can wrap it up in a custom function call, and call that function from your template.