I'm assuming you're using the Twig engine, (the default templating engine for Symfony2). To disable caching in twig, so that you do not have to keep clearing the cache like so:
rm -rf app/cache/*
Navigate to your app config file (by defualt will be located in ../app/config/config.yml from your root directory). Scroll to the twig configuration settings (under twig:) and change the cache value (which should be pointing to the cache directory) to false like so:
twig: cache: false
If you do not see any cache configuration entry, simply add the line above