SQL stored procedure to produce custom XML text

I have around 30 tables from which I need to generate a specific XML format, which is consistent through the tables. With my current solution I have a stored procedure for each 30 tables where I do: select '' + '' + '' + '' + '' + '' + '' + from dbo.table where the parantheses values are hardcoded for each table. So for example in one table (id column) is CUSTOMER_ID. While in a different table (id column) is STORE_ID. and (fieldname) is for example CUSTOMER_NAME. So they are all hardcoded column names in the brackets and primary key in . So my stored procedure with all 30 tables is around 1000 lines long, as every column and primary key is hardcoded for each table. I'm certain there is a dynamic way to achieve this functionality where columns/rows are somehow iterated over, but I can't figure it out.