if($user_id!=$user['id']) {
echo '<div class="menu"><center><a href="profile.php?act=friends&amp;do=add&amp;id=' . $user['id'] . '" class="ssilka" style="display: block; max-width: 200px;"><font color="#fff">Do`stlik taklif qilish</font></a></center></div>';}

Shu kodga yana nima qoshsam va qanday qoshsam Bu foydalanuvchi sizni do'stingiz deb chiqadi