Displays too many items

<?php 
include("include/data.php");






$pageTitle = "Full Catalog";
$section = null;

if(isset($_GET["cat"])){

  if($_GET["cat"]== "books"){
      $pageTitle = "Books";
    $section = "books";
  }
     else if($_GET["cat"]== "movies"){
       $pageTitle = "Movies";
       $section = "movies";
  }
    else if($_GET["cat"] == "music"){
      $pageTitle= "Music";
      $section = "music";
  }
}
include("include/header.php");

?>

<div class="section catalog page">
  <div class="wrapper">

      <h1><?php echo $pageTitle;?></h1>

    <ul class="itemS">
       <?php foreach($catalog as $item){
        echo 
          "<li><a href='#'>
        <img 
        src='" .$item["img"]."'
        alt='"
          .$item["title"];"'/>"
        . "<p>View Details</p>"
        . "</a></li>";
        }
      ?>
    </ul>

  </div>




</div>
<?php include("include/footer.php");?>