As I read your scenario, it looks like you've handled the upload and moved the files to your 'temp' folder, and now you want to move the file when they perfom a new action (clicking on the Next button).

As far as PHP is concerned - the files in your 'temp' are not uploaded files anymore, so you can no longer use move_uploaded_file.

All you need to do is use rename:

if(isset($_POST['next_page'])) { 
  if (!is_dir('../images/uploads/listers/'.$_SESSION['loggedin_lister_id'])) {
    mkdir('../images/uploads/listers/'.$_SESSION['loggedin_lister_id']);
  }

  foreach($_SESSION['uploaded_photos'] as $key => $value) {
    $target_path = '../images/uploads/listers/'.$_SESSION['loggedin_lister_id'].'/';
    $target_path = $target_path . basename($value); 

    if(rename($value, $target_path)) {
      echo "The file ".  basename($value). " has been uploaded<br />";
    } else{
      echo "There was an error uploading the file, please try again!";
    }

  } //end foreach

} //end if isset next_page