print_nodes($data);

sub print_nodes {
    my $data = shift;

    foreach my $node ( @{ $data->{node} } ) {
        print $node->{name} . ": " . $node->{text} . "\n";
        if ( $node->{node} ) {
            print_nodes($node);
        }
    }
}

##</code><code>##

1st node: Text of 1st node
2nd node: Text of 2nd node
subnode A: Text of subnode A
subnode B: Text of subnode B
3rd node: Text of 3rd node

##</code><code>##

print_nodes( $data, 0 );

sub print_nodes {
    my ( $data, $depth ) = @_;
    my $tab_width = 4;

    foreach my $node ( @{ $data->{node} } ) {
        my $indent = " " x $depth x $tab_width;
        print $indent . $node->{name} . ": " . $node->{text} . "\n";
        if ( $node->{node} ) {
            print_nodes( $node, $depth + 1 );
        }
    }
}

##</code><code>##

1st node: Text of 1st node
2nd node: Text of 2nd node
    subnode A: Text of subnode A
    subnode B: Text of subnode B
3rd node: Text of 3rd node