Code
    <Grid Grid.Row="1">
            <Image Source="Image/Navigate.gif" Stretch="Fill" Margin="0,0,0,0"/>
            <StackPanel Orientation="Horizontal" VerticalAlignment="Center">
                <TextBlock FontSize="18" Margin="10,0,10,0"><Hyperlink x:Name="hyperlink1" Click="hyperlink1_Click" Style="{StaticResource HyperStyle}">1</Hyperlink></TextBlock>
                <TextBlock FontSize="18" Margin="10,0,10,0"><Hyperlink x:Name="hyperlink2" Click="hyperlink2_Click" Style="{StaticResource HyperStyle}">2</Hyperlink></TextBlock>
                           </StackPanel>
        </Grid>
        <Frame Grid.Row="2" Source="http://localhost" x:Name="Frame">
        
        </Frame>

Code
 private void hyperlink1_Click(object sender, RoutedEventArgs e)
        {
            //this.Frame.Source = new Uri("FirstPage.xaml");
           //this.Frame.Navigate(new Uri("First.xaml"));
        }