This is from the Jamzone - Basic Funk articles, go there to learn more.

Guitar 1 was: Cm x Bm Cm x (repeat) (where 'x' means a muted strike).

Guitar 2 (in this ActionTab) is: Cm Cm Cm Cm Cm Bm Cm x * x x x x (repeat 3 times)

Fourth time, play: Cm Cm * Cm Cm Bm Cm x * x x x x

The * is where you skip a strum. In other words, keep your wrist strumming up and down constantly, but on those strokes, just don't contact the strings. Like here and here (press play to see).

After that first funky part, just do the little Cm arpeggio again - we looked at that in the previous ActionTab. Your fingers should already be in position from playing the previous Cm Chord to comfortably switch into picking through this arpeggio. Then straight back to play through this again:

Cm Cm Cm Cm Cm Bm Cm x * x x x x (repeat 3 times)

Fourth time, play Cm Cm * Cm Cm Bm Cm x * x x x x

The key to getting this guitar part down is to learn Funk Basics - Guitar 1 first. Then your hands will be familiar with the chord changes and rhythm. All we are doing with this Guitar part is elaborating on the rhythm, mainly by adding in faster strums. Keep your wrist constantly moving up and down, applying pressure and releasing pressure with your fretboard hand to alternate between chord stabs and muted strumming.

Loop this slowed ActionTab and keep at it until you start getting the co-ordination and technique right. When you can play it tight, it is important to build speed. Go to the main Guitar 2 ActionTab (in the Jamzone) and work at playing along with that faster pace.

Don't give up! Once you can get the rhythmic muting and chord stabs mixing together like this, you'll have learned one of the most important and fundamental rhythm techniques on guitar! You will be well on your way to Funk God status.