link-field as a link in a disk-based-template

how can I output the URL of the link-field as a link in a disk-based-template?

I tried the two suggestions from the "Body Variables":
print $node->field_link['de'][0]['url']
print $node->field_link['de'][0]['display_url']

but they both show only the URL in letters, not as link

Thanks for any help!