Implements hook_theme().
Expose all layouts as theme items, so themes can override layout markup.
function layout_theme($existing, $type, $theme, $path) {
$items = array();
foreach (layout_manager()
->getDefinitions() as $name => $layout) {
$items[$layout['theme']] = array(
'variables' => array(
'content' => NULL,
),
'path' => $layout['path'],
'template' => $layout['template'],
);
}
return $items;
}