Custom field value in category list

I have a field for my categories called “cf_produkter_kategorier_mini_thumb”. I need to display it in the wordpress categories list. Here’s what i’m using…

<?php
//list terms in a given taxonomy (useful as a widget for twentyten)
$taxonomy = 'category';
$tax_terms = get_terms($taxonomy);
?>
<ul>
<?php
foreach ($tax_terms as $tax_term) {
echo '<li>' . '<a href="' . esc_attr(get_term_link($tax_term, $taxonomy)) . '" title="' . sprintf( __( "View all posts in %s" ), $tax_term->name ) . '" ' . '>' . $tax_term->name.'</a></li>';
}
?>
</ul>