import bpy
            from bpy.props import *

            def initSceneProperties(scn):
                stin = bpy.types.Scene

                stin.MyString1 = BoolProperty(
                    name = "String")
                scn['MyString1'] = "Test 1"

                stin.MyString2 = BoolProperty(
                    name = "String")
                scn['MyString2'] = "Test 2"
                return

            initSceneProperties(bpy.context.scene)

            #   Layout panel
            class LayoutPanel(bpy.types.Panel):
                bl_label = "Hide Tools"
                bl_space_type = "VIEW_3D"
                bl_region_type = "TOOL_PROPS"

                def draw(self, context):
                    layout = self.layout
                    scn = context.scene

                    layout.label("TEST")
            # First Layer
                    layout.prop(scn, 'MyString1', text="")
                    row = layout.row(align=True)
                    row.operator("my.button", text="1", icon="CANCEL", toggle=True)

            # Second Layer
                    layout.prop(scn, 'MyString2', text="")
                    row = layout.row(align=True)
                    row.operator("my.button", text="2", icon="CANCEL", toggle=True)

            #   Button
            class OBJECT_OT_Button(bpy.types.Operator):
                bl_idname = "my.button"
                bl_label = "Button"

                def execute(self, context):
                    scn = context.scene
                    layout = self.layout
                    icon = LayoutPanel.draw

                    if scn.MyString1 == "MyString2" | row.operator(toggle=True):
                        label = "TEST2"
                        icon.row.operator[icon] == "ERROR"
                        icon.row.operator[text] == "A"
                        icon.row.operator[toggle] = True
                    else:
                        scn.MyString1 == "MyString1"
                        label = "TEST1"
                        icon.row.operator[icon] == "CANCEL"
                        icon.row.operator[text] == "B"
                        icon.row.operator[toggle] = False
                    return{'FINISHED'}

            bpy.utils.register_module(__name__)