List_Categories – how to make first and last link have different class

I worked out a way I can do it using php. The only problem is I don’t know how to dynamically get the first and last ID number.

My examply php (at pastie.org)

hey,

i had the same probleme, then i found a function in a thread, but it did not work, so i rewrote it and is works pretty well,

i’m shure it could be imporved by comdining both regex into one, but still, it works pretty good

function add_last_class($input) {
	if( !empty($input) ) {

		$pattern = '/<li class="/is';
		$replacement = '<li class="first ';

		$input = preg_replace($pattern, $replacement, $input);

		$pattern = '/<li class="(?!.*<li class=")/is';
		$replacement = '<li class="last ';

		$input = preg_replace($pattern, $replacement, $input);

		echo $input;
	}
}

/* the echo=0 parma is important here */
add_last_class(wp_list_categories('title_li=&echo=0'));

hope it helps