[Steven Zahm]

@ George

Pretty nice!

You need to add an if statement before you output the tab HTML and its content. Something like this should do it.

if ($atts['show_email'] !== '') {
    if ( $entry->getEmailAddresses() ) {

        echo '';
            echo '<input type="radio" name="tabs" id="tab5">';
            echo '<label for="tab5">Email</label>';
            echo '<div id="tab-content5" class="tab-content animated fadeIn">';     
                if ( $atts['show_email'] ) echo                 
                $entry->getEmailAddressBlock( array( 'format' => $atts['email_format'] , 'type' => $atts['email_types'] ) );
            echo '</div>';
        echo '';
    }
}