block.tab.php

<?php

ob_start();

$switcher = null;

if (isset($block['data']['list']) && is_array($block['data']['list'])) foreach ($block['data']['list'] as $item) {
    if (!$item['active']) continue;
    print '<li>';
    print '<a>' . (strlen($item['title']) ? $item['title'] : '&nbsp;') . '</a>';
    print '</li>';
    $switcher .= '<li class="uk-clearfix">' . $item['html'] . '</li>';
}

if (!$html = ob_get_clean()) return;

$classNames = array('uk-tab');

$options = array();

if ($value = $block['data']['active']) {
    $options['active'] = intval($value);
}

if ($block['data']['tab-options']) foreach (is_array($block['data']['tab-options']) ? $block['data']['tab-options'] : explode('|', $block['data']['tab-options']) as $option) if ($option) {
    if (substr($option, 0, 3) === 'uk-') $classNames[] = $option;
}

if ($options) foreach ($options as $k => $v) if (is_string($k)) $options[$k] = $k . ': ' . $v;

print '<ul class="' . implode(' ', $classNames) . '" uk-tab' . ($options ? '="' . htmlspecialchars(implode('; ', $options)) . '"' : '') . '>';
print $html;
print '</ul>';

print '<ul class="uk-switcher" uk-switcher' . ($options ? '="' . htmlspecialchars(implode('; ', $options)) . '"' : '') . '>';
print $switcher;
print '</ul>';

?>
<script>
cmsRequire(['uikit']);
</script>
<?php

$html = ob_get_clean();

ob_start();

print $Main->callTemplate('block/block', 'block', $Page, array( 'block' => $block, 'html' => $html ));

?>