TinyMCE - edit output image links

I´m using TinyMCE editor with default image plugin for content management. Everything works fine, the only problem is, that I can´t use LightBox inside links generated by TinyMCE. It is some way how to adjust output generated for images by TinyMCE for all inserted images or wrap link with ? I don´t need any checkbox or something - the solution should be for all images inserted using TinyMCE. Many thanks!