When your website means business.

Cookies, CSS, PHP | Type: PHPSet Cookie, Change Content (or change class)

Using a cookie to change content for repeat visits.

At the top of your page (before doc declaration):
<?php
   $revisit = false;
   if(isset($_COOKIE['div'])){
      $revisit = true;
   } else {
      setcookie('div', true, 86400 + time()); //24 hours shown (seconds)
      $revisit = false;
   }
?>

Then where you want your on-page content:
<?php
   if($revisit){
      echo '<div>You&rsquo;ve been here before!</div>';
   } else {
      echo '<div>It&rsquo;s your first time!</div>';
   }
?>
OR
<?php
   if($revisit){
      echo '<div class="something-after">';
   } else {
      echo '<div class="something-first">';
   }
?>