$(document).ready(function(){
  $('.post td:has("span.postdetails.poster-profile")').each(function(){
      var username = $(this).children('span.name').text();
      $(this).children('span.postdetails.poster-profile').append('<br><a class="add_friend" href="/profile?friend=' + username + '&mode=editprofile&page_profil=friendsfoes"><strong>اضفني كصديق لك</strong></a>');
  });
});