I often find myself in need of building a structure of SPWebs for demo purposes or for custom migrating scenarios. In order for me to build the structure fast, test it and then tear it down or extend it, I use PowerShell.

Just extend the $url and the $name so they match your desire.

Add-PSSnapin microsoft.sharepoint.powershell
$pre = "https://intranet/"
$url = (

$name = (
"Subsite name",

for($i=0; $i -le $url.Count; $i++)
$urlvalue = $url[$i]
$namevalue = $name[$i]
New-SPWeb -Url($pre + $urlvalue) -Template CMSPUBLISHING#0 -UseParentTopNav -Name $namevalue -Language 1030