you can use the same meta_key for multiple values, for example:
meta_key – ‘links’ meta_value – ‘link1’
meta_key – ‘links’ meta_value – ‘link2’
then you can get the meta as an array of links:
$links = get_post_meta($post->ID, 'links');
if ($links){
foreach ($links as $link){
echo $link;
}
}