How to get product information from product Id?.

Answer 1

$_item['product_id'] is a product id . We will find out categoryid associate with product.

$product = Mage::getModel('catalog/product')->load($_item['product_id']);
$cats = $product->getCategoryIds();

Now we have category ID(s). One product can associate with more then one categorys. This is Magento default nature.

foreach ($cats as $category_id) {
    $_cat = Mage::getModel('catalog/category')->setStoreId(Mage::app()->getStore()->getId())->load($category_id);
        echo $_cat->getName();             
    }

$_cat->getName(); is your product category name. This is beneficial if product is associate with a single category. if product is associate with multiple category then we need category ID to get product category name.

i hope this will little helpful for you