Дмитрий Кондаков

<?php
$tv = $modx->getObject('modTemplateVar', array('name' => $name));
$elements = $tv->get('elements');
$element = explode('||', $elements);
$els = array();
foreach($element as $e) {
  list($elName,$elId) = explode("==", $e);
  $els[$elId] = $elName;
}
echo $els[$input];

[[+square_from:tvValue]]

echo "<option value=\"".date("Y-m-d H:i:s", strtotime("+7 day"))."\">7 дней </option>";

<a href="[[~[[*id]]]]#">link</a>