plsql - how to by pass the need for dynamic sql

On Oracle 10.2
I am looking for a way to write a plsql procedure without the use of dynamic SQL.
Inside I need to add a where clause with a parameter that is actually a concatinated list of values:

proedure foo (p_list in varchar2) is
  v_result1     number;
   .
   .
   .
begin
  select field1,field2, field3...
  into    v_result...
  from  my_table
  where   id in (p_list) ;    -- This is the dilema!!!
end;
/

The procedure is being called like this:
foo ('3,5,5656,77');

I know how to do it with dynamic SQL, looking for a way to avoid it.
any ideas?