links disappeared

hello there, any help would be appreciated.

My links seem to have disappeared from view, I was wondering if it was anything to do with the code below and if there is an error somewhere?

<!– start links –>

<?php /* If this is the frontpage */ if ( is_home() || is_page() ) { ?>
<?php
$link_cats = $wpdb->get_results(“SELECT cat_id, cat_name FROM $wpdb->linkcategories”);
foreach ($link_cats as $link_cat) {
?>
<li id=”linkcat-<?php echo $link_cat->cat_id; ?>”><h3 type=”none” {
margin:0px 0 0 0;
}><?php echo $link_cat->cat_name; ?></h3>

<?php wp_get_links($link_cat->cat_id); ?>

<?php } ?>

<!– end links –>

any help would be much appreciated.