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<!-- Main bannerize container -->
<div class="wpx_bannerize">

<!-- Single banner container -->
 <div class="wpx_bannerize_banner_box wpx_bannerize_banner_mime_imagepng" id="banner-id">
  <a href="http://beta.wpxtre.me" target="_blank">
   <img title="Banner description" 
       alt="Banner description"
       src="/image.png" border="0" />
  </a>
 </div>

<!-- Single banner container -->
 <div class="wpx_bannerize_banner_box wpx_bannerize_banner_mime_imagepng" id="banner-id">
  <a href="http://beta.wpxtre.me" target="_blank">
   <img title="Banner description" 
       alt="Banner description"
       src="/image.png" border="0" />
  </a>
 </div>

<!-- Another banner... -->

</div>
<!-- wpx_bannerize -->

<?php
$defaults = array(
 'random'   => false,
 'numbers'  => 10,
 'category' => '',
 'order'    => 'ASC',
 'orderby'  => 'menu_order',
);

<?php
// Display all banners from category "sidebar" in random order
if( function_exists( 'wpx_bannerize' ) ) {
    wpx_bannerize( array( 'random' => true, 'category' => 'sidebar' ) );
}

// Display one banner from category "sidebar" in random order
if( function_exists( 'wpx_bannerize' ) ) {
    wpx_bannerize( array( 'random' => true, 'numbers' => 1, 'category' => 'sidebar' ) );
}

[wpx_bannerize random="1" category="sidebar-blog"]

[wpx_bannerize random="1" category="56"]

[wpx_bannerize random="1"]