1. Determine the molecular shape of each species using VSEPR theory.
   We compare the shapes within each option.

2. Option A: $SF_4$, $XeF_4$, $CCl_4$

• $SF_4$: Sulfur has 5 electron pairs around it $(4$ bond pairs $+1$ lone pair$)$
  Electronic geometry: trigonal bipyramidal
  Molecular shape: see-saw

• $XeF_4$: Xenon has 6 electron pairs around it $(4$ bond pairs $+2$ lone pairs$)$
  Electronic geometry: octahedral
  Molecular shape: square planar

• $CCl_4$: Carbon has 4 bond pairs, no lone pair
  Molecular shape: tetrahedral

These are not identical.

3. Option B: $ClF_3$, $XeOF_2$, $XeF_3^+$

• $ClF_3$: Chlorine has 5 electron pairs $(3$ bond pairs $+2$ lone pairs$)$
  Electronic geometry: trigonal bipyramidal
  Molecular shape: T-shaped

• $XeOF_2$: Count electron domains on Xe.
  Xenon has 8 valence electrons. Around Xe: one $Xe=O$ bond, two $Xe-F$ bonds, and two lone pairs.
  Thus steric number $=5$ $(3$ bonded regions $+2$ lone pairs$)$
  Electronic geometry: trigonal bipyramidal
  Molecular shape: T-shaped

• $XeF_3^+$:
  Valence electrons on Xe: $8-1=7$ Add 3 fluorine atoms contributing one electron each in bond framework consideration; after bonding, Xe effectively has 5 electron domains $(3$ bond pairs $+2$ lone pairs$)$.
  So steric number $=5$
  Electronic geometry: trigonal bipyramidal
  Molecular shape: T-shaped

Thus all three have identical T-shaped geometry.

4. Option C: $BF_3$, $PCl_3$, $XeO_3$

• $BF_3$: trigonal planar
• $PCl_3$: trigonal pyramidal
• $XeO_3$: Xenon has 3 bond pairs and 1 lone pair $ightarrow$ trigonal pyramidal

Not identical.

5. Option D: $PCl_5$, $IF_5$, $XeO_2F_2$

• $PCl_5$: trigonal bipyramidal
• $IF_5$: $5$ bond pairs $+1$ lone pair $ightarrow$ square pyramidal
• $XeO_2F_2$: Xe has 4 bonded regions $(2$ O, $2$ F$)$ and 1 lone pair $ightarrow$ trigonal bipyramidal electron arrangement, see-saw shape

Not identical.

6. Conclusion

The only group in which all molecules have the same shape is: $\boxed{B}$

So the molecules $ClF_3$, $XeOF_2$, and $XeF_3^+$ are all T-shaped.