[suzkaw]

Sorry I got side tracked.

I believe how I did was like this:

{if isset($extras.value)}
                     {foreach key=key item=item from=$extras.value}
                          {if $extras.fID==4 || $extras.fID==5}
                            {$item|linkurl:30}
                        {else}
                        {$item}
                        {/if}
                      {/foreach}
                     {/if}

You would change this line to the field id of the extra fields.
{if $extras.fID==4 || $extras.fID==5}

To get these values you should be able to place {$extras.fID} before the {$item}