<?php
$custom_fields = get_post_custom();
if (isset($custom_fields['banner']) || isset($custom_fields['siccor'])) {
?>
  <div class="bannercon">
    <div class="wrapper">
      <?php
      if (isset($custom_fields['siccor'])) {
        get_template_part('content', 'siccor');
      }
      if (isset($custom_fields['buttons'])) {
        get_template_part('content', 'buttons');
      }
      if (isset($custom_fields['banner'])) {
        get_template_part('content', 'banner');
      }
      ?>
    </div>
  </div>
<?php
}
?>