The easiest way to do this is with a VBA macro:
Sub Every7()
Dim i As Integer, j As Integer, cl As Range
Dim myarray(100, 6) As Integer 'I don't know what your data is. Mine is integer data
'Change 100 to however many rows you have in your original data, divided by seven, round up
'remember arrays start at zero, so 6 really is 7
If MsgBox("Is your entire data selected?", vbYesNo, "Data selected?") <> vbYes Then
MsgBox ("First select all your data")
End If
'Read data into array
For Each cl In Selection.Cells
Debug.Print cl.Value
myarray(i, j) = cl.Value
If j = 6 Then
i = i + 1
j = 0
Else
j = j + 1
End If
Next
'Now paste the array for your data into a new worksheet
Worksheets.Add
Range(Cells(1, 1), Cells(101, 7)) = myarray
End Sub
This takes this:

and transforms it to this:
