Maybe this will help. 
PHP Code:
<?php
$response = new SimpleXMLElement(
'http://sandbox.api.shopping.com/publisher/3.0/rest/GeneralSearch?apiKey=authorized-key&trackingId=7000610&keyword=nikon',
null,
true
);
foreach($response->categories->category->items->product as $product)
{
printf(
'
<h3>%1$s</h3>
<p>%2$s</p>
<a href="%3$s" alt="%1$s">More...</a>
',
$product->name,
$product->shortDescription,
$product->productOffersURL
);
}
/*
<h3>Nikon CoolPix S630 Digital Camera</h3>
<p>12.7 Megapixel, Compact Camera, 2.7 in. LCD Screen, 7x Optical Zoom, With Video Capability, Weight: 0.31 lb.</p>
<a href="http://www.shopping.com/xPO-Nikon-CoolPix-S630~linkin_id-7000610" alt="Nikon CoolPix S630 Digital Camera">More...</a>
<h3>Nikon COOLPIX S220 Digital Camera</h3>
<p>10.7 Megapixel, Ultra-Compact Camera, 2.5 in. LCD Screen, 3x Optical Zoom, With Video Capability, Weight: 0.22 lb.</p>
<a href="http://www.shopping.com/xPO-Nikon-Nikon-Coolpix-S220-Aqua-Green-10-0MP-3x-Optical-Zoom-2-5-LCD~linkin_id-7000610" alt="Nikon COOLPIX S220 Digital Camera">More...</a>
<h3>Nikon Coolpix S230 Digital Camera</h3>
<p>10.34 Megapixel, Compact Camera, 3 in. LCD Screen, 3x Optical Zoom, With Video Capability, Weight: 0.26 lb.</p>
<a href="http://www.shopping.com/xPO-Nikon-Coolpix-S230~linkin_id-7000610" alt="Nikon Coolpix S230 Digital Camera">More...</a>
<h3>Nikon COOLPIX S70 Digital Camera</h3>
<p>12.39 Megapixel, Compact Camera, 3.5 in. LCD Screen, 5x Optical Zoom, With High Definition Video, Weight: 0.31 lb.</p>
<a href="http://www.shopping.com/xPO-Nikon-COOLPIX-S70~linkin_id-7000610" alt="Nikon COOLPIX S70 Digital Camera">More...</a>
<h3>Nikon Coolpix P90 Digital Camera</h3>
<p>12.1 Megapixel, Point and Shoot Camera, 3 in. LCD Screen, 24x Optical Zoom, With Video Capability, Weight: 1.01 lb.</p>
<a href="http://www.shopping.com/xPO-Nikon-Coolpix-P90~linkin_id-7000610" alt="Nikon Coolpix P90 Digital Camera">More...</a>
*/
?>
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