Hide add to cart for Guest User in Magento - php

Question

I got some code while searching for hide add to cart button at category products but i am not able to set this below code to my given List.phtml, Please guide me.
Now we will hide the ‘Add to Cart’ button on category list page. Open /app/design/frontend/default/themeXXX/template/catalog/product/list.phtml file and look for the following code:
<?php
if (!Mage::getSingleton('customer/session')->isLoggedIn()) {
echo '<span class="login_for_details" style="float:left"><strong>Login to Add to Cart</strong></span>';
} else { ?>
My website list.phtml
<?php if ($product->isSaleable()) : ?>
<?php if ( !($product->getTypeInstance(true)->hasOptions($product) || $product->isGrouped()) ) : ?>
<?php if(!Mage::getStoreConfig("ajaxcart/addtocart/enablecategory", $code)):?>
<form id="addtocart_form_<?php echo $_product->getId(); ?>" action="<?php echo $this->getAddToCartUrl($_product) ?>" method="post">
<input type="hidden" name="form_key" value="<?php echo Mage::getSingleton('core/session')->getFormKey(); ?>" />
<?php endif; ?>
<div class="qty-field">
<label for="qty"><?php echo $this->__('Qty:') ?></label>
<div class="qty-holder">
<input type="text" name="qty" id="qty_<?php echo $_product->getId(); ?>" maxlength="12" value="<?php echo $product->getProductDefaultQty() * 1 ?>" title="<?php echo $this->__('Qty') ?>" class="input-text qty" />
<div class="qty-changer">
<i class="icon-up-dir"></i>
<i class="icon-down-dir"></i>
</div>
</div>
</div>
<?php if (!Mage::getStoreConfig("ajaxcart/addtocart/enablecategory", $code)) :?>
</form>
<?php endif; ?>
<?php endif; ?>
<?php endif; ?>
<?php endif; ?>

Answer 1

If your changing in your core code then add the below code in your List.phtml
<?php $session = Mage::getSingleton('customer/session', array('name' => 'frontend')); ?>
<?php if($session->isLoggedIn()) { ?>
//Your Add to Cart Button Html
<?php } else { ?>
// Your Login to Add to Cart Html
<?php } ?>
Put the above code everywhere on your frontend where your products are displaying.