Press Ctrl+J again to duplicate layer and clear layer style. Press Ctrl+T to miniaturize shape 93% Horizontal and Vertical, after that select Direct Selection Tool to correct anchor points to get the shape as below:

Use Layer > Rasterize > Shape and change the color to white for this shape

Make selection with Polygonal Lasso Tool (Feather: 17 px) and press Delete to clear selection inside.

Press Ctrl+D to remove the selection. Now you’ll want to add the icon to the button. Get out the Custom Shape Tool and select Thumb Tack Shape (this is standard shape).

Use the white color to get the picture as below:

OK, we’re done for that part, but we want to add line where we can put some text in menu. Go to the background layer and make a new one shape using Rounded Rectangle Tool (Radius: 7 px). All layers of the button must be above this shape.

Now it’s time for some more layer styles, like Outer Glow , Inner Glow, Gradient Overlay and Stroke: