The question as it stands is quite vague, but here goes.
Your assembler/C code needs the data in a given format, to be able to assemble/compile.
You suggest using Excel to maintain the menus… your assembler/compiler will not understand xls or csv (or most likely xml) so a direct export is not an option.
However, you could write a VBA script to generate an asm/c file from the Excel data.
solved Excel data file for menu program [closed]