How to render custom html in tabs block

Standard

Remove _prepareForm() function from your Tab block and add constructor as shown below

class Company_Module_Block_Adminhtml_CustomSettings_Edit_Tab_Settings extends Mage_Adminhtml_Block_Widget_Form
{

    public function __construct()
    {
        $this->setTemplate('MODULE_NAME/customsettings/view.phtml');
    }

}

Create a view.phtml file at design/adminhtml/default/default/template/MODULE_NAME/customsettings

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