How to create a field that links to author listing view of current item author

1. Create a new field of type 'text' and name it "Author profile 2"
2. Create 1 custom layout for the 'text' field type and name it 'valueauthor_profile.php'
3. Add in it

<?php echo '
  <a href = "index.php?option=com_flexicontent&view=category&layout=author&authorid='
   . $item->created_by . '" alt="' . JText::_('MY_STRING_THIS_AUTHOR_CONTENT') . '">'
   . JText::_('MY_STRING_MORE_CONTENT_FROM_THIS_AUTHOR') . '
  < /a>';
?>

4. Edit the field "Author profile 2"and select the layout (inside the viewing TAB) 'valueauthor_profile.php'
5. Add new field in a template position of the ITEM layout (that your items are using for being displayed)