http://pastebin.com/DrKnjdsB

<?php

// I want just render some template from memory with engine I use for rendering templates.
// I want to reuse already configured engine with macros, helpers and other stuff.

// Well lets get retarded...
$previous = $this->latteEngine->getLoader();
$this->latteEngine->setLoader(new Latte\Loaders\StringLoader)->render($content, $parameters);
$this->latteEngine->setLoader($previous);

// If it was properly designed (nette database all over again)
$context = new Latte\RenderContext($this->latteEngine, new Latte\Loaders\StringLoader);
$context->render($content, $parameters);