Item submission form without category

Thank you
I just begin to use FlexiContent and I'm not yet developper (don't have knowledge enought)... Could you tell me the name of the CSS class please, and the syntax to write ?

you need to heck it with firebug and add class like
.yourclass{
display:none;
}
you need to learn a litte with can't do a css support

Thank you
After two days looking for the right class, I found the class name for the category's values, (.container_fcfield_name_catid and .container_fcfield_name_cid) but not for the category's title with its frame... A little bit hard !...

#jform_catid-lbl {
display: none;
}
.container_fcfield.container_fcfield_name_catid {
display: none;
}