Metallic Roller Style Left Navigation Panel

Create a rectangle using rectangular shape tool.

Press Ctrl+T. Right Click and select Warp. Select "Bulge" from the preset warp shapes. Adjust settings as shown.

Double click the layer to open layer style window. Apply settings as shown.

Create a rectangle using rectangular shape tool.

Apply gradient overlay layer style.

Create another rectangle and apply same gradient layer style.

Double click the layer to open layer style window. Apply settings as shown.

Create some lines using line tool. Merge all the line layers. Reduce their opacity.

Select all the button layers. Duplicate them several times and place below each other as shown.

Create some more lines behind every button. Place them as shown.

Move these layers below all the layers in layer order in layer palette.

Create a vertical line a shown. Press Ctrl+T. Right Click and select Warp. Select "Flag" from the preset warp shapes. Adjust settings as shown.

Place line on the left.

Duplicate the layer. Press Ctrl+T. Right click and select Flip Horizontal and place on the other side.

Type link names and place over the buttons.