page.ss

Page.php

<?php

class Page extends SiteTree {

    private static $has_many = array(
        'Emails' => 'Page_Email'
    );

    /**
     * CMS Fields
     * @return FieldList
     */
    public function getCMSFields()
    {
        $fields = parent::getCMSFields();
        $fields->addFieldToTab(
            'Root.Emails',
            GridField::create(
                'Emails',
                'Emails',
                Page_Email::get(),
                GridFieldConfig_RecordEditor::create()
            )
        );
        return $fields;
    }

}

class Page_Controller extends ContentController {



}


class Page_Email extends DataObject
{

    private static $db = array(
        'Title' => 'EmailAddress'
    );

    private static $has_one = array(
        'Page' => 'Page'
    );


}

Page.ss

<% loop $Emails %>
<ul id="emails">
    <li>
        <a href="mailto:$Title.HiddenEmailAddress.RAW">$Title.HiddenEmailAddress.RAW</a>
    </li>
</ul>
<% end_loop %>