If you want to add magento product review form anywhere on your product page instead of review tab just add following simple code.

Step1: open: catalog.xml in your “layout” directory. Find this section:

<reference name="content">
<block type="catalog/product_view" name="product.info" template="catalog/product/view.phtml">

Step2: Add the following after above line:

<block type="review/form" name="product.review.form" as="review_form"/>

<block type="review/product_view_list" name="product.info.product_additional_data" as="product_additional_data_review" template="review/product/view/reviews-in-tab.phtml">

<block type="review/form" name="product.review.form" as="review_form"/>

</block>

Step3: Now call following code where you want to display review form:

<?php echo $this->getChildHtml('product_additional_data_review') ?>

<?php echo $this->getChildHtml('review_form') ?>

Note: if you want to display review form in your product tab, click here