<TreeViewItem IsSelected="{Binding ElementName = ИмяЭлемента, Path = Item.IsSelected}"/>

<Window x:Class="WpfApplication1.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:sys="clr-namespace:System;assembly=mscorlib"
        xmlns:col="clr-namespace:System.Collections;assembly=mscorlib"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"        
        Title="MainWindow" Height="350" Width="525">   
    <Window.DataContext>        
        <col:ArrayList>
            <sys:String>Мама</sys:String>
            <sys:String>Папа</sys:String>
            <sys:String>Вася</sys:String>
            <sys:String>Петя</sys:String>
        </col:ArrayList>        
    </Window.DataContext>
    <Grid>
        <Grid.RowDefinitions>
            <RowDefinition Height="*" />
            <RowDefinition Height="*" />
        </Grid.RowDefinitions>
        <Grid.ColumnDefinitions>
            <ColumnDefinition Width="*" />
            <ColumnDefinition Width="Auto" />
            <ColumnDefinition Width="*" />
        </Grid.ColumnDefinitions>
        <GridSplitter Grid.Column="1" Width="5" HorizontalAlignment="Center" VerticalAlignment="Stretch" Grid.RowSpan="2"/>
        <ListView x:Name="list1" ItemsSource="{Binding Path=.}" Grid.Column="2" Grid.Row="1" Background="Coral"/>
        <ListView x:Name="list2" ItemsSource="{Binding ElementName=list1, Path=ItemsSource}" SelectedItem="{Binding ElementName=list1, Path=SelectedItem, Mode=TwoWay}" Background="Coral"/>
        <TreeView x:Name="tree" ItemsSource="{Binding ElementName=list1, Path=ItemsSource}" SelectedValuePath="{Binding ElementName=list1, Path=SelectedItem, Mode=TwoWay}" Grid.Row="1" Background="Aqua"/>
    </Grid>
</Window>