Here's the default templates for the Public Blogroll Tool Extension, just in case you lose the originals:
HTML Blogroll
<div class="blogroll"> #for $category in $categories <div class="sidetitle">$category</div> <div class="side"> #for $blog in $blogs #if $blog.category == $category <a href="$escape_html($blog.url)">$escape_html($blog.title)</a> <br/> #end if #end for </div> #end for </div>
OPML Blogroll
<?xml version="1.0" encoding="ISO-8859-1"?>
<opml version="1.0">
<head>
<title>OPML Blogroll</title>
<ownerName>Generated from BlogMatrix Jäger</ownerName>
</head>
<body>
<outline title="Blogroll">
#for $category in $categories
<outline title=$quote_attribute($category)>
#for $blog in $blogs
#if $blog.category == $category
<outline
title=$quote_attribute($blog.title)
url=$quote_attribute($blog.url)
#if $blog.syndication_url
xmlUrl=$quote_attribute($blog.syndication_url)
#end if
/>
#end if
#end for
</outline>
#end for
</outline>
</body>
</opml>