http://api.jquerymobile.com/table-reflow/#option-classes.reflowTable
classes.cellLabels (Default: "ui-table-cell-label"): "Class added to the first cell within each grouped header's column. This makes it easy to style these differently to visually delineate the column groups."
classes.reflowTable (Default: "ui-table-reflow"): "Class added to the generated label content added to each table cell based on the header name."
Pretty sure that the current description for reflowTable is actually the description for cellLabels, since ui-table-cell-label is added to a <b> element inside each cell that contains the header name. The reflowTable class (ui-table-reflow) is actually added to the table element. The current description for cellLabels makes no sense to me.