1 I/O expander such as MCP23016 + 3 resistors should do.

Tons of way to multiplex stuff on low pin count PIC, and then.. this bring this ol', but still good Microchip app note AN234.
http://ww1.microchip.com/downloads/e...tes/00234a.pdf

and
http://techtrain.microchip.com/maste...ses/40040b.pdf

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OK Darrel

ADC is one of my favorite choice...