How to put some text in the center of a bootstrap row?

Question

There is a row which has four col-sm-3 columns. I need to put some text in the center of this row which means the text need to span the 2nd column and the 3rd column.

Here is my Bootply

Here's some code:

<div class="row">
  <div class="col-md-3" style="background-color:yellow">123</div>
  <div class="col-md-3" style="background-color:green">456</div>
  <div class="col-md-3" style="background-color:red">789</div>
  <div class="col-md-3" style="background-color:grey">000</div>
</div>

Plus: To clarify,I need the text to be overlayed on the same line.

Answer 1

Just add

<div class="text-center">Center aligned text.</div>

Before all of those columns like this

<div class="row">
  <div class="text-center">Center aligned text.</div>
  <div class="col-md-3" style="background-color:yellow">123</div>
  <div class="col-md-3" style="background-color:green">456</div>
  <div class="col-md-3" style="background-color:red">789</div>
  <div class="col-md-3" style="background-color:grey">000</div>
</div>

But if you want something to take only set amount of columns, then you need another row and offset like this

<div class="row">
  <div class="col-md-offset-3 col-md-6">
    <div class="text-center">Center aligned text.</div>
  </div>
</div>
<div class="row">
  <div class="col-md-3" style="background-color:yellow">123</div>
  <div class="col-md-3" style="background-color:green">456</div>
  <div class="col-md-3" style="background-color:red">789</div>
  <div class="col-md-3" style="background-color:grey">000</div>
</div>

EDIT: If you want that text to span/float literally over those two spans, then you will need something similar like "Shawn Taylor" suggested

<div class="row">
  <div class="col-md-3" style="background-color:yellow">123</div>
  <div class="col-md-6" style="position:relative;">
    <div style="position: absolute; z-index: 2; left: 0; top: 0; width: 100%;" class="text-center">Center aligned text.</div>
    <div class="row">
      <div class="col-md-6" style="background-color:green">456</div>
      <div class="col-md-6" style="background-color:red">789</div>
    </div>
  </div>
  <div class="col-md-3" style="background-color:grey">000</div>
</div>