Concatenate multiple result rows of one column into differents rows (horizontal)

Question

I have the following query (SQL SERVER):

select id,id_nivel_estructura from estructuras_empleado where id in (1,2)

The result is the following:

but I want to display in columns in the following way:

 1 | 4 | 67 | 146 | 345 | 2158

 2 | 3 | 34 | 267 | 345 | 2152

Could you help me?