asi es , si se puede mira este ejemplo
add 1 to ncol.
CLEAR ls_fieldcat.
ls_fieldcat-row_pos = nrow.
ls_fieldcat-col_pos = ncol.
ls_fieldcat-tabname = l_tabname .
ls_fieldcat-fieldname = 'SAKNR'.
ls_fieldcat-seltext_l = text-TA1. -----> aqui le pones ''
ls_fieldcat-seltext_m = text-TA1.
ls_fieldcat-seltext_s = text-TA1.
* ls_fieldcat-ref_tabname = 'BSEG'.
ls_fieldcat-outputlen = 10.
APPEND ls_fieldcat TO lt_fieldcat.