Remove my product reviews from navigation magento
Open the review.xml of your theme layout and comment out below code
<customer_account_index>
<!-- Mage_Review -->
<reference name="customer_account_dashboard">
<block type="review/customer_recent" name="customer_account_dashboard_info1" as="info1" template="review/customer/recent.phtml"/>
</reference>
</customer_account_index>
