Customized form_for in ApplicationHelper

Rails
1

hello,

I want to make a table within a form by making a new form_tag. The
following code in ApplicationHelper fails:

def tabular_form_for(name, object = nil, options = nil, &proc)
concat("

", proc.binding)
form_for(name,
object,
(options||{}).merge(:builder => TabularFormBuilder),
&proc)
concat("
", proc.binding)
end

But using this tag in my view, I get errors with my :errors, :name
fields of the form.
Any ideas how to make this custom tag work?