How can snippets generate your markup with classes in MODX?

Question

MODX

Good evening everyone.
I encountered such a problem in modex - I planted the layout, css - dropped for my markup, but how it came to the need to use snippets ... in general, I still did not understand how to generate HTML inline with my classes (so that styles were applied) &[email protected] generates markup. and adds as classes - it's not clear to me where he gets them from.

(Fig. 1 " doesn't work")
If I try to create a regular chunk with the markup I need by adding &tpl='mychank' to the snippet, on the front-end I generally get an array of resources instead of a menu in the form lines. By the way, this happens even when I try to register my classes, right in line. Although the array is different...
How to correctly generate classes and attributes for html elements generated by snippets?