If I understand you correctly...
Add this link to where you need it. This is the link
only without any other tags or classes, you will have to add those to match it's location.
Code:
<a href="{xen:link search/member, '', 'user_id={$visitor.user_id}', 'content=thread'}" rel="nofollow">{xen:phrase your_content}</a>
And either change the phrase "your_content" to display "My Content" or create a new phrase instead and replace it in this line of code.