Suppose, you have the product data, i.e. you have a loaded product information stored in a variable named ‘$_product‘. Now, when you type $_product->getManufacturer() , you will get the manufacturer ID. To get the manufacturer name, you have to use the following: $_product->getAttributeText(‘manufacturer’). Below is the complete code:
Get Manufacturer Name and ID from Product
/**
* Load product by product id
*/
$_productId = YOUR_PRODUCT_ID;
$_product = Mage::getModel('catalog/product')->load($_productId);
/**
* Get manufacturer name
*/
$_manufacturerName = $_product->getAttributeText('manufacturer');
/**
* Get manufacturer id
*/
$_manufacturerId = $_product->getManufacturer();
Hope it helps. Thanks.